Whooping Crane Recovery Activities

October, 2010 – August, 2011

by Tom Stehn

Whooping Crane Coordinator

U. S. Fish and Wildlife Service

Highlights

The Aransas-Wood Buffalo population (AWBP) of whooping cranes rebounded from 263 in the spring of 2010 to 279 in the spring, 2011.  With approximately 37 chicks fledged from a record 75 nests in August 2011, the flock size should reach record levels of around 300 this fall.  Threats to the flock in Texas including land development, reduced freshwater inflows, the spread of black mangrove, the long-term decline of blue crab populations, sea level rise, land subsidence, and wind farm and power line construction in the migration corridor all continue to be important issues.

Twelve whooping crane juveniles were captured in Wood Buffalo National Park (WBNP) in August 2011, bringing the total number of radioed birds to 23.  Crews visited migration stopover sites to gather habitat use data.  This project is being carried out by the U.S. Geological Survey (USGS) with partners including The Crane Trust, Canadian Wildlife Service (CWS), U.S. Fish and Wildlife Service (USFWS) and others.  It is funded by the Platte River Recovery Implementation Program, The Crane Trust, and the Northern Prairie Wildlife Research Center.  The tracking is the first done on the AWBP in 25 years and is a top research priority of the Whooping Crane Recovery Team!  Since the 1950s, 525 AWBP whooping cranes have died with only 50 carcasses recovered, and approximate cause of death was determined in only 38 instances.  It is imperative that we learn more about whooping crane mortality.

Based on opportunistic sightings, the Cooperative Whooping Crane Tracking Project documented 79 confirmed sightings of whooping cranes in the U.S. Central Flyway during fall, 2010 and 49 sightings in spring, 2011.

Ten captive-raised whooping cranes were released in February, 2011 at White Lake, Louisiana where a non-migratory flock had resided up until 1950.  Seven of the birds were alive after the first seven months of the project.

Production in the wild from reintroduced flocks in 2011 was again very disappointing with no chicks fledged in Florida or Wisconsin.  Incubation behavior in Florida and nest abandonment in Wisconsin continued to be the focus of research.  Data collected so far in Wisconsin indicates that swarms of black flies play some kind of role in a majority of nest abandonments.

The captive flocks had a good production season in 2011.  Approximately 17 chicks were raised in captivity for the non-migratory flock in Louisiana, and 18 chicks are headed for Wisconsin (10 for the ultralight project at the White River marshes, and 8 for Direct Autumn Release at Horicon National Wildlife Refuge).  Approximately four chicks of high genetic value were held back for the captive flocks.

Including juvenile cranes expected to be reintroduced this fall, flock sizes are estimated at 278 for the AWBP, 115 for the WI to FL flock, 20 nonmigratory birds in Florida, and 24 in Louisiana.  With 162 cranes in captivity, the total of whooping cranes is 599.

Read the full report…

Nesting Research Conducted on Florida Cranes

We continue to study the whooping cranes of the Florida resident flock. The flock contains 20 birds, 16 of which are paired. This spring we employed camera “traps” near nests of whooping and sandhill cranes in order to learn more about nesting issues. Camera traps, or trail-cameras as they are sometimes called, are cameras triggered by heat differential and motion. At night they use infrared “flash” to illuminate the photos. Wildlife cannot see the flash so it does not affect their behavior.

Most of our data so far are from sandhill crane nests and all results are preliminary. However, we are seeing some interesting results from the camera traps at nests. The cameras were useful for documenting 1) many occasions of visitors (representing disturbances or potential disturbances) to nests, 2) whether a nest was successful or not, 3) water levels at nests,and 4) behaviors of the birds at their nests. The following examples are presented in that order.

Camera traps successfullydocumented many disturbances or potential disturbances at nests. For one nest,the last image of the attending crane was when it flushed from the nest in the dark; and then a bobcat (Lynx rufus) walked by the nest.

 

While the nest was unattended, raccoons (Procyonlotor) came and scavenged the nest.

 

 

 

 

 

 

 

Raccoons were common near nests; at one nest they triggered the camera daily. Coyotes (Canis latrans) and an alligator (Alligator mississippiensis) also were photographed.

Sandhillcranes defended their nests from curious livestock, even when it meant dealing with an animal that weighed 200 times more than the crane.

 

 

Camera traps also successfully documented whether nests hatched. Camera placement in relation to the nests provided clear views of chicks when they hatched.

Also significant at this nest was the fact they were also incubating a data-logging egg that we had placed in their nest. The data recorded will provide a “known successful” recipe for incubation temperature.

Camera traps also documented water levels. This is important because too much water can flood nests and too little water will cause abandonment. One nest was unique in that the nest was constructed of mud and sticks on a natural rise in an otherwise open-water pond. Extremes in water level can be seen at this nest in the next picture.

 

Camera traps captured important bird behaviors. Last year we discovered from data-logging eggs that whooping cranes were sometimes leaving their nests unattended at night. This quarter we deployed the first-ever successful camera trap at a whooping crane nest.

Important was the documentation of the pair exchanging incubation duties in the dark.

 

Of the trailcam photos from sandhill nests we reviewed thus far there have been no obvious nest exchanges at night. This could be a fundamental behavioral difference between the 2 species that previously has been undescribed (but we’ll need data from more whooping crane nests before we can say that). Or, it could be a behavioral artifact of captive rearing for the whooping cranes. Whatever the reason, it would seem to add vulnerability to the eggs and potentially attract attention to the nests of whooping cranes.

We ended the 2011 nesting season with data from 22 sandhill crane nests and 7 whooping crane nests. The results are still preliminary, but it is evident that these new techniques for studying nest success are providing exciting and valuable information about crane reproduction. We plan to continue the study next year to get more data, especially from whooping crane nests. This work was funded in part by the U.S.Fish and Wildlife Service.

Marty Folk, Florida Fish and Wildlife Conservation Commission.

Wind Farm Update

An interesting twist on the wind farm story from the Star Tribune, Minneapolis, MN

Your comments needed…

See earlier posts:

Vast wind energy proposal could kill endangered birds

Wind Farms and Whooping Cranes

 

Opportunity to provide your comments to:

DEPARTMENT OF THE INTERIOR, Fish and Wildlife Service concerning effects of wind turbines on Whooping Cranes.

Draft Environmental Impact Statement and Habitat Conservation Plan for Commercial Wind Energy Developments Within Nine States

AGENCY: Fish and Wildlife Service, Interior.

ACTION: Notice of intent; announcement of public scoping meetings; request for comments.

———————————————————————–

SUMMARY: We, the Fish and Wildlife Service, as lead agency advise the public that we intend to prepare an environmental impact statement (EIS) on a proposed application, including a Habitat Conservation Plan (HCP), for an Incidental Take Permit (ITP) under the Endangered Species Act of 1973, as amended. The potential ITP would include federally listed and candidate species within portions of nine states (North Dakota, South Dakota, Montana, Colorado, Nebraska, Kansas, New Mexico, Oklahoma, and Texas).

The activities covered by a potential ITP would include regional-level construction, operation, and maintenance associated with multiple commercial wind energy facilities. The planning partners are currently considering, for inclusion in the HCP, certain species listed as federally threatened or endangered, or having the potential to become listed during the life of the HCP, and having some likelihood of being taken by the applicant’s activities within the proposed permit area. The intended effect of this notice is to gather information from the public to develop and analyze the effects of the potential issuance of an ITP that would facilitate wind energy development within the planning area, while minimizing incidental take and mitigating the effects of any incidental take to the maximum extent practicable.

We provide this notice to (1) Describe the proposed action; (2) advise other Federal and state agencies, potentially affected tribal interests, and the public of our intent to prepare an EIS; (3) announce the initiation of a 90-day public scoping period; and (4) obtain suggestions and information on the scope of issues and possible alternatives to be included in the EIS.

Click on the following for the total Federal Register Announcement

Wind Farms and Whooping Cranes

The development of wind farms is occurring at a rapid pace in the Central Flyway with many of the best wind sites located in the whooping crane migration corridor. Tom Stehn, Whooping Crane Coordinator, U.S. Fish and Wildlife Service (USFWS) advised the Whooping Crane Conservation Association (WCCA) that multiple wind farms have already been built with more planned. Stehn stated, “It is important to analyze the potential impact of literally tens of thousands of wind turbines that may be placed in the whooping crane migration corridor in the coming years.      

Current estimates are that 2,705 turbines are operational at 40 wind farms in the U. S. whooping crane migration corridor.  The average wind development project consists of 57 turbines (data generated by the Great Plains Wind Energy Habitat Conservation Plan (HCP) in March, 2011).      

The majority of wind farms do not require federal permits and thus there is no nexus for the companies to consult with USFWS under the Endangered Species Act (ESA). However, the projects must avoid “take” of endangered species under Section 9 of the ESA. USFWS’ Stehn advised that: “For the totality of wind energy development, there is a very definite issue of “take”.  Wind farms have the potential to directly kill whooping cranes from the turbines themselves or associated power line development, or could result in “take” of hundreds of square miles of migration stopover habitat if whooping cranes tend to avoid wind farms.”  The National Academy of Science Report in 2004 on Platte River endangered species confirmed unequivocally the threat to whooping cranes if migration habitat is lost.      

Early on in discussions with wind companies, USFWS talked of two possible scenarios for offsetting anticipated impacts of wind farms.  These were to set aside whooping crane migration stopover habitat in perpetuity to counter potential loss of habitat from wind farm construction, as well as to mark new power lines, as well as some existing power lines to offset the threat of whooping cranes colliding with a wind turbine or power lines built to support wind development.      

According to Stehn: “At the urging of USFWS at meetings held in Denver and Houston as well as regular conference calls, 19 of the largest wind development companies joined together to work on endangered species issues throughout the whooping crane migration corridor in the U.S.  With the support of the State of Oklahoma, the industry group received a grant of $1,080,990 to develop a landscape level, multi-species HCP that would include the lesser prairie chicken.  The grant was awarded through the Cooperative Endangered Species Conservation Fund under the HCP Planning Assistance Program. The HCP will be designed to avoid and minimize impacts to endangered and threatened species associated with wind energy development.”        

This multi-species HCP will be the first of its kind to involve alternative fuel sources while protecting endangered species.  In a meeting in Tulsa, Oklahoma in November, 2010, four species were added to the HCP (Sprague’s pipit, mountain plover, piping plover and interior least tern), joining the whooping crane and lesser prairie chicken.  An additional meeting was held in March, 2011 in Albuquerque.  It does appear that this industry group will agree to have the wintering grounds of the whooping cranes as off- limits to wind energy development.  However, projects in the migration corridor are currently being built and are not waiting for this HCP to be completed.      

In 2010, monitoring for cranes was done at the Titan I wind facility in South Dakota.  In the spring, a group of 5 whooping cranes spent 3 days approximately 2 miles from the project.  The closest they were ever on the ground from a turbine was 1.2 miles.  When they resumed migration, the nearest turbine was shut down in a very rapid response as the monitor called in that the cranes were flying.  The cranes passed by that turbine at a distance of about one-half mile.  In the fall, two groups of whooping cranes (2+1 and 2) flew within 0.5 and 0.3 miles from an operating turbine but did not seem to alter their flight behavior.       

Research on sandhill cranes in west Texas done by Laura Navarrete of Texas Tech University documented two observed instances of cranes being killed by wind turbine blades.  Although sandhill cranes definitely avoided wind farms, she also observed accommodation with cranes foraging right at the base of turbines.  Research done by U.S. Geological Survey at Horicon NWR in Wisconsin also showed some avoidance by sandhill cranes from wind farms.

WCCA article based on communications with Tom Stehn, USFWS

Vast wind energy proposal could kill endangered birds

By Laura Zuckerman
SALMON, Idaho (Reuters)| Thu Jul 14, 2011 6:13pm EDT

The Obama administration is evaluating a plan to allow a 200-mile corridor for wind energy development from Canada to the Gulf of Mexico that would allow for killing endangered whooping cranes.

The government’s environmental review will consider a permit sought by 19 energy developers that would permit turbines and transmission lines on non-federal lands in nine states from Montana to the Texas coast, overlapping with the migratory route of the cranes.

The permit from the U.S. Fish and Wildlife Service would allow the projects to “take” an unspecified number of endangered species. Under the Endangered Species Act, “take” is defined as killing or injuring an endangered species

The government can issue permits to kill or injure listed species with no penalties or risks of lawsuits to developers who agree to craft conservation plans. According to federal officials, the large scale of the review will help streamline the permitting process by lumping many projects into a single study.

The Obama Administration has been working to speed development of renewable energy projects by improving coordination among various state and federal agencies. Environmentalists, however, say the “fast track” process results in inadequate environmental reviews.

The Administration’s latest wind energy proposal raises concerns among wildlife advocates because the developments would overlap with habitat imperiled birds such as whooping cranes rely on, including the Central Flyway, a migratory path that cuts through North America’s midsection between the Arctic and the Tropics.

The leading cause of death for the nation’s last historic population of whooping cranes, which stand at 5 feet and have a wingspan of more than 7 feet, is overhead utility lines, the Fish and Wildlife Service said.

Conservationists say the Central Flyway’s population of 280 cranes — which make a refueling stop along Platte River in Nebraska along with tens of thousands of sandhill cranes and snow geese — would suffer with the loss of just a single adult breeding bird.

‘RAREST OF BIRDS’

“I can hardly imagine what the government is thinking. Whooping cranes are the rarest of all the cranes, the rarest of American birds,” said Paul Johnsgard, author of several books on the cranes and professor emeritus of ornithology at the University of Nebraska.

Fish & Wildlife Service Director Dan Ashe said wind energy is crucial to the nation’s future economic and environmental security, which is why the agency is paving the way for a renewable energy project with an undetermined number of wind turbines generating an unidentified amount of electricity along the 200-mile-wide corridor.

“We will do our part to facilitate development of wind energy resources, while ensuring that they are sited and designed in ways that minimize and avoid negative impacts to fish and wildlife,” he said in a statement.

Whooping cranes, North America’s tallest bird, once numbered in the tens of thousands before hunting and habitat loss caused their populations to plummet to 16 in the 1930s.

The cranes, which annually migrate thousands of miles from wintering grounds in coastal Texas to breeding and nesting areas in Alberta, Canada, were at the forefront of an emerging wildlife conservation movement in the 1960s that gave rise to a series of landmark laws aimed at preventing extinctions of rare and declining animals.
Whooping cranes were among the first creatures added to an early version of the Endangered Species Act in 1967.

Few other populations of whooping cranes exist in the United States, with an introduced flock in central Florida that does not migrate and a fledging group in Wisconsin that biologists have trained to fly to the winter refuge of Florida by following ultralight aircraft.

Attempts to establish crane populations elsewhere, including Idaho and Colorado, have failed.

Government scientists have not yet determined how many whooping cranes, other threatened and endangered birds and imperiled bats would be killed or otherwise harmed because of the wind project, said Amelia Orton-Palmer, conservation planner with the service.

“It’s so early in the process we won’t begin to speculate on what that might be,” she said.

Trustees Approve $286,750 for Habitat Purchases

Trustees of Whooping Crane Conservation Association recently approved expenditure of $286,750 to acquire three tracts of private land currently used by whooping cranes.  These sites are located within the lands designated as Critical Habitat wintering area for whooping cranes along the Texas Coast.  Critical habitat contains those habitat qualities essential to conservation and recovery of the species.  The Trustees believe it is important for the Association to do everything possible to protect these sites from residential and commercial development and to preserve them for continued use by the cranes.  A majority of the funds committed for these acquisitions came from bequests to WCCA from two women. Lurae A Brinkerhoff provided $281,515 in 1998 and Elizabeth F. Overton gave $36,260 in 1999.  The Association is deeply grateful for the donation by these women that will do so much to preserve habitat for the cranes.  The purchase of these sites, scheduled for this summer, will support goals of the Canada/U.S. International Recovery Team.

The Association is partnering with The Coastal Bend Bays and Estuaries Program, and The Nature Conservancy, to purchase fee title on two tracts totaling 168 acres of freshwater and estuarine marshes, tidal mudflats, and saline uplands on Copano Bay.  The total cost is estimated to be $348,800 with 25 percent ($86,750) being WCCA’s share.  The southern unit is part of a territory that a pair and their chicks have used for several years.  The northern unit is used by subadults and unpaired adult whooping cranes.  We anticipate that the properties will eventually be transferred into the public trust, and possibly become part of Aransas National Wildlife Refuge.  Other protected lands in the vicinity are Goose Island State Park, the Lamar and Tatton Units of Aransas National Wildlife Refuge, and the Mission-Aransas National Estuarine Research Reserve.

The Association is also partnering with The Nature Conservancy to acquire a conservation easement on 108.8 acres of private land bordering San Antonio Bay.  The easement will restrict any action that would be detrimental to the conservation purpose for whooping cranes and their habitat.  This area is used as wintering habitat by two dozen whooping cranes often referred to as the Welder Flats population.  The easement would prohibit further development or construction on this tract which borders resort properties known as Falcon Point Ranch. 

 The property is a prime piece of the Ranch, suitable for development, which borders salt marsh used by whooping cranes.  Other protected crane habitats in the vicinity are Welder Flats Wildlife Management Area, Welder Flats Coastal Preserve, Guadalupe River Wildlife Management Area, and Aransas National Wildlife Area.  The Whooping Crane Conservation Association’s $200,000 contribution for the easement will be combined with other public and private funding to fulfill the total real estate, contractual and land acquisition cost of $1,050,187.

Two Women’s Donations Preserve Wintering Habitat

Thanks to the love of two women for the beautiful whooping cranes, and their desire to see these birds survive as a species, our Whooping Crane Conservation Association is able to preserve critical wintering habitat on the Texas Coast.  Both women named our Association in their wills.  We wish to honor their memory and contributions.

LURAE AHRENDES BRINKERHOFFF, of Green River, Wyoming, died April 20, 1996.  Born in Los Angeles, California, March, 1940, she earned a degree in music education and continued her training in music, teaching, wildlife, photography, and calligraphy until her death.  She believed that one’s education should never end.  Lurae taught instrumental music in public schools for 24 years and upon her retirement she continued to teach classes on Wyoming Wildlife and served as a conservation volunteer.  From 1986 to 1994 she served as a volunteer at Gray’s Lake National Wildlife Refuge in Idaho, assisting with administrative details, greeting visitors, and doing field studies.  She loved to watch sandhill cranes and cross-fostered whooping cranes, keeping records on their behavior and movements in southeastern Idaho.  She assisted in banding sandhill cranes and trumpeter swans and retrieved and cared for sick or injured birds.  In 1990, the Whooping Crane Conservation Association awarded Lurae a Certificated of Appreciation in recognition of her conservation efforts.  In 1996, the U. S. Fish and Wildlife Service recognized her substantial contribution towards recovery of the whooping crane.  During her lifetime she received other awards for music, leadership, and photography.  The Gray’s Lake Marsh Overlook, on the refuge, is dedicated in her memory.  In her will she bequeathed $281,515 to the Association and these funds provided a major portion of the monies now committed to acquire wintering habitat for whooping cranes.

ELIZABETH F. “BETTY” OVERTON, of Pueblo, Colorado, died August 27, 1998.  Born August 24, 1915, in Attleboro, Massachusetts, she and her husband Robert B. Overton made generous contributions to the Whooping Crane Conservation Association throughout their lifetime.  Robert, a newspaper columnist and conservationist, preceded her in death in 1994.  Betty worked as a Girl Scout Professional in Allentown, Pennsylvania, and Michigan City, Indiana, before joining the Red Cross to work in military hospitals in Hawaii with wounded servicemen during World War II.  After the war she became head of the Girl Scouts in Pueblo, Colorado and first Director of Camp Lazy Acres.  After marriage she became a fifth grade teacher at Central Grade School in Pueblo.  In 1996, Betty received the Whooping Crane Conservation Association’s Certificate of Appreciation for her untiring efforts as Chair of the Information and Education Committee.  Other recognitions of her abilities include the Arkansas Valley Audubon Society Environmental\Education Award, runner-up in the Colorado conservation NACO-Allis Chalmer contest, and a Certificate of Merit from the Silver Star Lodge for service to community youth.  In her will she donated $36,260 for continued support of conservation efforts for recovery of whooping cranes.  Her donation, and that of Ms. Brinkerhoff, made it possible for the Association to protect Texas crane habitats and set them aside as sanctuaries for whooping cranes.

The First Flight of Lucky

By Marty Folk, Wildlife Biologist, Florida Fish and Wildlife Conservation Commission.

The first and only video that comprehensively portrays the life history of a pair of whooping cranes raising a chick in the wild

In 2002 a pair of reintroduced whooping cranes nested in an area of central Florida that made it possible to observe and document their entire breeding season, from nest-building through the successful fledging of a chick. Never before had anyone witnessed this complete cycle in the wild, let alone capture it on video.

This chick was the first whooping crane to fledge in the wild in the United States in 63 years (all others had fledged in Canada). Landowners adjacent to the nest marsh named the chick “Lucky”, largely due to the fact that there were many attempts by predators to catch the chick.

Despite the fact that the pair of whoopers were at the young-end of the scale for breeding (they hatched 2 chicks before they turned 4 years of age), and were first-time parents, they had shown “model” parent behavior:

  • They successfully tended their eggs for the month-long incubation period, protecting the eggs through several episodes of freezing temperatures and also protecting the eggs from overheating when it was in the 90’s. They hatched both eggs.
  • One chick, at a young age, was taken from the nest by a bald eagle while the parents were away with the other chick. [This predation of one chick is “normal” for whooping cranes and has been documented in Wood Buffalo National Park, Canada, where ravens were the predator]. Later, the pair protected the surviving chick from numerous attacks by a pair of bald eagles. About the last time the pair of eagles was seen at the marsh, the whooper parents attacked and “hospitalized” one of the eagles for several weeks before rehabilitators could release the eagle.
  • The pair protected their chick a number of times from dogs. At the approach of dogs, one parent would run with the chick while the other parent would “distract” the dogs by running toward them and diverting their attention.
  • As is normal for cranes, the parents kept the chick warm at night by “brooding” it on the nest platform. When the water dried up around the nest, the parents built new platforms wherever the water was left in the marsh (this provides a protective “mote” of water around them). The fact that the parents built these platforms after hatching was a behavior previously unknown to science.
  • For weeks after the chick hatched, the parents spent a majority of their waking hours catching small prey items to feed the chick. They fed the chick a high-protein diet, concentrating on earthworms, insects, and other organisms small enough for the chick to swallow. On one occasion when Lucky was 26 days old, the parents were observed to feed it 37 times in 5 minutes.

Lucky the Whooping CraneLucky took his first flight at 76 days of age and had become a skilled and strong flier within 2 weeks. When Lucky was older, and before he became independent of its parents, biologists captured and banded him. The attachment of a radio transmitter would allow biologists to track the chick after it left its parent’s territory. Without the transmitter the chick’s fate would never be known. At the time of capture, a small blood sample was taken. From the sample it was determined that Lucky was a male.

The chick became independent of its parents early in 2003, at which time it dispersed to an area 6 miles away where it spent time with other whooping cranes. During a severe drought, Lucky and another bird were roosting in a large marsh. The water had dried up and apparently was not providing the normal degree of protection from predators, and Lucky was killed by a predator in August 2004. Biologists of course were very disappointed, but at least the mortality was due to “natural” causes.

However, the historical significance of the fledging of this chick remained. Not only had Lucky become the first whooping crane to fledge in the wild in the U.S. since 1939, he was the first whooping crane to fledge as a result of a reintroduction of this species. It was a time of celebration for people from the many cooperating agencies that worked on this introduction project. Many people visited the nest marsh and witnessed some part of this story that is documented in the video.

Lucky and his parents became ambassadors for conservation and especially for the whooping crane species.

This video was originally produced by the Florida Fish and Wildlife Conservation Commission in 2003 and was shared with the Whooping Crane Conservation Association, who used it for educational purposes. All monies derived from the sales were used for conservation of the species.

The 2-part video can be viewed online on the Whooping Crane Conservation Association YouTube Channel.

House votes to Slash Spending on Conservation Programs

On May 31, the Committee on Appropriations in the U.S. House of Representatives passed the fiscal year 2012 (FY12) agriculture spending bill, which included more than $1 billion in cuts for farm conservation programs with “mandatory” funding levels, reports the Wildlife Management Institute. The cuts in the 2012 Agriculture, Rural Development, Food and Drug Administration (FDA), and Related Agencies Appropriations Act come on top of a $500-million cut to these programs that was included in the final fiscal year 2011 continuing resolution last month. Overall, the bill proposes to cut U.S. Department of Agriculture (USDA) and FDA discretionary programs by 13.4 percent.  This is in addition to a reduction of nearly the same amount that was passed in the FY11 bill.

Read the full article on the Wildlife Management Institute web site.