The numbers are in. This August, 24 whooping crane fledglings were counted in and around Wood Buffalo National Park.
Rhona Kindopp, manager of resource conservation with Parks Canada in Fort Smith, said while two dozen fledglings is a low number, “it’s still within the natural range of variation that we would expect from this species.”
Kindopp continued: “In some migratory bird species, productivity is influenced greatly by weather. This spring, in early June, we saw a significant increase in the amount of rain that we received locally.”
Kindopp stressed the weather may be just one contributing factor. “Another factor could have been local predation cycles. In other words, there may have been a greater number of predators in the area than in previous years,” she said.
Breeding pair surveys are done in mid to late May over 4-5 days with a crew of 2-3 made up of Parks Canada staff and Canadian Wildlife Service biologists. Breeding pairs normally use the same territory each year to build their nest and raise their chicks. Knowing where the cranes nest helps make locating the adults and juveniles a bit more successful. Following further examination of the data, this year there were 87 nests in and around Wood Buffalo National Park. Up one from the 86 nests that were originally reported in May.
The fledgling survey is done in between the end of July and mid-August. Fledglings are birds that have reached an age where they can fly. The technique for this survey is very similar to the breeding pair survey. The nest locations are known so that the staff can fly directly to the nest. If the Whooping Cranes have not been successful in raising a chick they may still be in their territory or they could be kilometers away. If a pair does have a chick, they are generally found fairly close to their nest.
Importance of surveys
Both the Nest and the Fledgling Surveys are part of the world-class restoration plan that has made the endangered Whooping Crane an international success story and symbol of species recovery and conservation. By counting the number of fledgling chicks, Parks Canada, Canadian Wildlife Service, US Fish and Wildlife Service, and others gain important insights into the health of the world’s last remaining natural nesting flock of Whooping Cranes that contribute greatly to our ongoing stewardship of these magnificent birds.
WBNP and nearby areas provide the last natural nesting habitat for the endangered Whooping Cranes. The birds are hatched in and near WBNP each spring. After they fledge they migrate 2,500 miles to their winter habitat on, or near the Aransas National Wildlife Refuge on the Texas coast. During their 2,500 mile migration they stopover 20 to 30 times to rest, forage for food and roost during the nights. Then, the following April the total population returns to WBNP to repeat the reproduction cycle again.
“Friends of the Wild Whoopers has read the following article about Wood Buffalo National Park and it is disturbing. Over the past couple of years we have read other stories claiming serious environmental problems on or near Wood Buffalo. We have been advised by Canadian officials that these problems do not affect the endangered Whooping Crane nesting area. Now we are hearing otherwise. We will continue to monitor the situation and seek the truth.
The environmental deterioration described in the following reports reminds me of the tremendous problems that have been caused over many years to the Mississippi River ecosystem by United States government agencies.
Chester McConnell President
Friends of the Wild Whoopers”
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The 561-page report on Wood Buffalo National Park says industry, dams, climate change and natural cycles are sucking the watery lifeblood from the vast delta of northeastern Alberta’s Peace and Athabasca rivers.
The Whooping Crane images below, were taken during the recent Whooping Crane Nesting Survey on Canada’s Wood Buffalo National Park, (WBNP). Friends of the Wild Whoopers thanks the good folks at Wood Buffalo National Park for sending these fantastic photos to us so we could share with you. Be sure to click on each photo to enjoy and take in the beauty of WBNP’s nesting grounds at full size.
by Chester McConnell, Friends of the Wild Whoopers
A total of 86 Whooping Crane nests were located during the 2018 nesting survey on Wood Buffalo National Park (WBNP), Canada according to Rhona Kindopp, Manager of Resource Conservation, Parks Canada.
Whooping crane nest survey results
Kindopp explained: “We have a preliminary count of 86 nests, the second highest number ever recorded. Last year we set a record with 98 nests. We don’t count recently hatched chicks as part of this survey because we do a survey of fledged chicks each August. We are encouraged by the significant number of nests established this year. The previous record was 98 in 2017 and the before that it was 82 in 2014. We are seeing a large, relatively stable number of nests over the past few years, and the variance in the numbers of nests is within the normal range. We believe this bodes well for the ongoing health of the Wood Buffalo-Aransas Whooping Crane flock and we look forward to seeing the results when we count chicks later in the season.”
The next survey will be conducted in September to count the number of juvenile Whooping Cranes that hatched and survived.
WBNP’s central role
Notably, Kindopp pointed out that: “As the last natural whooping crane nesting habitat is under our stewardship, we play a central role in the nesting survey and in the fledgling survey that takes place later in the summer. Sharon Irwin, WBNP Resource Conservation Officer, WBNP Ecologist Lori Parker and John Conkin of the Canadian Wildlife Service took part in the survey, which was carried out May 25-29 for a total of 5 days.
The vast wetlands in northern Wood Buffalo National Park are the whooping cranes’ nesting area. They build their nests alongside the shallow ponds that contain the frogs and insects they feed on throughout the summer. There, the nesting pairs will raise one or occasionally two chicks which must then make the long trip back to Texas in the fall.
Canada’s network of protected areas play an important role by protecting and restoring healthy, resilient ecosystems and contributing to the recovery of species at risk.
Conducting the survey
Kindopp described the survey procedure: “The survey is carried out by flying in a helicopter in a grid pattern over last year’s nest locations. If we don’t find a nest on a grid search we then fly to the old nest site and fly ever widening circles around site. We also have recent locations for satellite banded birds to check.”
“The water levels in the ponds of the nesting area are good and overall habitat conditions look very positive this year. Clearly, the crane have found nesting conditions very favorable. Nesting started a bit later than usual this year because of cold temperatures.” according to Kindopp.
Due to the remote location of their nesting grounds and its inaccessibility to humans, the cranes are fairly secure while they are in the park. They face more challenges in their migration corridor through Canada and the United States due to habitat loss. We work with conservation agencies in the United States to monitor the progress of the cranes and share data on the state of their habitat.
Whooping crane life
Whooping Cranes live a hurried life during their reproduction period. When the nesting birds (5 years of age and older) leave their winter habitats on Aransas National Wildlife Refuge on the Texas coast they seem to be in a rush. Spring migration periods from Aransas to Wood Buffalo are quicker than the fall migrations that travel south. The belief is that the nesters are in a rush to get to their nesting grounds so they can nest and rear their chicks during the short summer period available in their northern range.
Wild Whooping Cranes have now settled down on Wood Buffalo. They arrived there during late April and May after migrating 2,500 miles from Aransas Refuge on the Texas coast. Each nesting pair located their nesting site which is normally in the same general area as past years. Park records show that several pairs have nested in the same areas for 22 consecutive years. Soon after their arrival on their nesting grounds, they build their nest.
Nesting territories for Whooper pairs vary in size but average about 1,500 acres. They guard their territories. Nesting neighbors typically locate their nest at least one-half mile away. Nests are normally constructed in shallow water with vegetation from the local area.
Wild Whooping Cranes nesting information
According to several research reports, eggs are typically laid in late April to mid-May. Normally two eggs are laid but infrequently only one and rarely three have been observed in nests. Incubation begins when the first egg is laid and continues for about 30 days. Since incubation starts when the first egg is laid, the first chick hatched is about two days older than the second hatched. This variance in age is significant and creates problem for the younger chick. It is weaker than the older chick and has difficulty keeping up as the adults move around searching for food. The younger chick often dies due to its weakness. Records indicate that only about 10% to 15% of the second chicks hatched survive. Importantly, the second egg plays an important role in providing insurance that at least one chick survives.
From the time Whoopers begin egg laying until their chicks are a few months old, the family groups remain in their breeding territory. They feed there and don’t move long distances until after their chicks fledge.
Nest survey results for the period 1966 to 2016 are shown in the graph below.
Figure 2. Nest survey results for the period 1966 to 2016.Figure 3. Sass River – Whooping Crane nesting grounds. Photo by John D. McKinnon
Figure 4. Whooping Crane on nest in Wood Buffalo National Park, Canada. Photo by Klaus Nigge
Parks Canada is a recognized leader in conservation. Through its Conservation and Restoration Program, Parks Canada takes actions to preserve national parks and contribute to the recovery of species-at-risk. Canada’s network of protected areas play an important role by protecting and restoring healthy, resilient ecosystems and contributing to the recovery of species at risk.
Friends of the Wild Whoopers will publish an update of the ongoing Whooping Crane chick reproduction and related activities soon.
