Tag Archive | Rare Species

Whooping Crane Sighting

The following piece was written by OAS Communications Coordinator AnnaKathryn Kruger for the Snapshot Wisconsin newsletter. To subscribe to the newsletter, visit this link

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Whooping crane 1-17 is, according to his personal biography, a natural-born leader. He is confident, vigilant, quick to take a jab at a potential threat and allegedly able to spot a worm at 50 yards.

This two-year-old crane, born and raised from captive breeding stock at the Patuxent Wildlife Research Center in Laurel, Maryland, is one of a rare species that has been newly restored to North America after overexploitation in the mid-20th century nearly drove them to extinction.

Whooping crane 1-17 appeared this spring on a Snapshot Wisconsin camera in Jackson County, much to the excitement of the Snapshot Wisconsin crew and the researchers stewarding 1-17’s journey across the landscape. View an interactive story map outlining 1-17’s journey here

“The conservation story behind [whooping cranes] is a marvelous story, involving a lot of effort and a lot of money,” said Davin Lopez, conservation biologist with the National Heritage Conservation Bureau in the Wisconsin Department of Natural Resources. “Although they’re recovering, they’re an incredibly rare species – I mean, people come from far and wide to see them – they’re a big, five-foot-tall, charismatic, pure white bird, so they’re pretty striking out there, very visible on the landscape. People find them very beautiful.”

Efforts toward the reintroduction of migratory whooping cranes to eastern North America began in 1999 with the formation of the Whooping Crane Eastern Partnership (WCEP). WCEP was founded as a collaborative project between the U.S. Fish and Wildlife Service, the International Crane Foundation, Operation Migration, the Wisconsin Department of Natural Resources, the United States Geological Survey, Patuxent Wildlife Research Center in Maryland, the USGS National Wildlife Health Center, the International Whooping Crane Recovery Team, the National Fish and Wildlife Foundation and the Natural Resources Foundation of Wisconsin.

The whooping crane is critically endangered in North America and has only one major migratory population, the Aransas-Wood Buffalo population (AWBP). This flock breeds in Canada, winters in Texas and comprises 505 birds as of December 2018.

Per the stipulations of the International Whooping Crane Recovery Plan, which outlined the need to establish one or more migratory crane populations in addition to the AWBP, WCEP has overseen the successful establishment of an eastern migratory population (EMP) of whooping cranes. In 2001, 7 individual cranes were guided in their migration from Wisconsin to Florida by aircraft, and 6 were guided back in the spring. As of July 2019, the estimated population size of the EMP is 87 individuals.

One significant barrier to the growth of wild whooping crane populations is the high mortality rate amongst wild chicks. Since 2002, WCEP has supplemented the wild crane population with chicks raised in captivity. These chicks were originally raised through costume-rearing, wherein the chick is raised by a human in costume. In recent years, researchers have transitioned to parent-rearing, where birds are raised in captivity by adult cranes, with minimal human intervention. 1-17 himself was a supplemental, costume-reared chick.

“Depending on the year, we get a certain number of chicks to release to supplement our wild population, and the bird in question, 1-17, is one of those birds. We also rely on natural reproduction, though historically we haven’t had a lot of it. That’s been one of our major struggles,” said Lopez. “Ultimately, we want to get to the point where we have a self-sustaining population out there that is above 100 birds at least, where we wouldn’t have to supplement any more birds.”

Crane 1-17 began his journey in the fall of 2017 in White River Marsh in Wisconsin with his sisters 2-17 and 8-17. When the birds failed to migrate on their own in a timely manner, they were relocated to Goose Pond in Indiana, and from there the trio flew to Talladega County in Alabama, where they spent the winter.

Come spring, the three cranes aimed north, but it swiftly became clear to researchers that they did not know the way back to Wisconsin. They spent some time in Illinois, and then 1-17 and 2-17 split from their sister and moved on to summer in Iowa.

At the end of November 2018, 1-17 and 2-17 took off from a stint in Northern Illinois and headed for the Wheeler National Wildlife Refuge in Alabama. Though they were met with a snowstorm en route, the pair persevered and were briefly reunited with 8-17 before she migrated to Tennessee in December.

In spring of 2019, 1-17 and 2-17 were observed wandering north and south through Indiana and Illinois, and eventually they found their way back to Wisconsin. The pair went their separate ways in April of 2019, and 1-17 was soon after captured on a Snapshot Wisconsin camera in Jackson County.

There is something of a learning curve when it comes to migratory behavior, and, as demonstrated by crane 1-17, there is sometimes a significant amount of wandering before whooping cranes grow to a reproductive age and settle.

The privilege of seeing one of these magnificent birds may be reserved for the select few who happen upon them out of sheer luck, but the population has been stable for several years and researchers look to the future of this species with optimism. Rare species like the whooping crane also become more visible as the state’s capacity for monitoring wildlife expands, and Snapshot Wisconsin spearheads this mission with a growing network of trail cameras posted throughout the landscape. As the project progresses, it will become easier to track the species that typically go undetected in wildlife surveys, better informing conservation efforts as well as broadening the public’s experience of Wisconsin wildlife.

“If you want to see a crane, we hope that you’re able to go out and find one,” said Lopez. “They may be rare in Jackson County, but we hope they’re a permanent fixture on the landscape in Wisconsin during the summer.”

Rare Species Sighting: American Marten

In late February this year, a Snapshot Wisconsin trail camera deployed in Vilas County captured an American marten (Martes americana). This is the first time an American marten has been captured on a Snapshot Wisconsin camera! The below American marten was identified by the trail camera host, Ashley, and the identification was then confirmed by several species experts in the Wisconsin DNR. While American marten can vary in color, they are best identified by their pale buff to orange throats, dark legs and tails, vertical black lines running above the inner corners of their eyes, and bushy tails that account for one-third of their total length.

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American marten captured on a Vilas County Snapshot Wisconsin trail camera.

Extirpated from Wisconsin in the 1940’s, these small members of the weasel family were later reintroduced to the state and placed on the Wisconsin Endangered Species List in 1972 due to loss of suitable habitat. Marten are restricted to the northern portion of the state where they reside in dense, mature forests with preference for areas that are a mix of coniferous and deciduous trees.

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Counties shaded in blue have documented occurrences for American marten in the Wisconsin Natural Heritage Inventory database. The map is provided as a general reference of where occurrences of American marten meet NHI data standards and is not meant as a comprehensive map of all observations. Source: WNDR.

Did you know that marten are excellent climbers? They use this skill not only to hunt down prey, but also to avoid potential danger. These solitary animals are very territorial, with territories spanning an average of two square miles for males and one square mile for females. Although the breeding season lasts from July to August, fertilized eggs do not fasten to the uterine wall until January or February. Females birth two to four kits in March or April, and raise their young in tree dens without any male assistance.

There is still much to be learned about American marten, as their nocturnal lifestyle and often shy demeanor make them a difficult species to study. Follow this link for more information about American marten in Wisconsin, and stay tuned to discover what rare species will be captured next on Snapshot Wisconsin trail cameras!

Snapshot Saturday: May 18th, 2019

Test your Wisconsin wildlife identification skills with this below trail camera image. These small, rare members of the weasel family were once extirpated from the state and later reintroduced in Wisconsin northwoods. Staff members were pleasantly surprised when the first individual of this species made their debut on a Snapshot Wisconsin camera in Vilas County this year!

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Interested in hosting your own Snapshot Wisconsin camera? Visit our webpage to find out how to get involved: https://dnr.wi.gov/topic/research/projects/snapshot/.