The Whooping Crane Eastern Partnership (WCEP) is celebrating another success in its efforts to reintroduce a wild migratory Whooping Crane population in eastern North America. A Whooping Crane chick hatched yesterday in Marathon County, Wis.
Black flies may be responsible for a high number of Whooping Cranes abandoning their nests in the core reintroduction area in central Wisconsin. To test this hypothesis, the Whooping Crane Eastern Partnership (WCEP), the coalition of public and private groups that is reintroducing Whooping Cranes to eastern North America, has been conducting a multi-year study to examine the causes of nest abandonment.
An effective solution for damage that Sandhill Cranes cause to planted corn seeds has been used in record amounts during the just-completed 2012 planting season and represents a win-win solution for both conservation and agriculture. Developed by the International Crane Foundation (ICF) and Arkion LLC, Avipel® has been available to farmers since 2006.
Since 1990, ICF has banded over 400 Sandhill Cranes in central Wisconsin, one of the densest nesting populations of cranes known anywhere in the world (we annually track around 60 breeding territories in our 6,400 ha study area). The small leg bands and radio transmitters, the latter placed on a select number of cranes, allow our staff to identify and track individual birds – once we can identify individuals, we can follow their movements, form hypotheses about their behaviors, and test these ideas in the field.
ICF’s Field Ecology Department (FED) staff are continuing their study of nesting Whooping Cranes in central Wisconsin and factors that may lead to nest abandonment. One hypothesis is that biting black flies may be harassing the cranes, to the extent that the birds cannot remain on their nest for the full 30-day incubation period. Following is an account of our spring research involving black flies, insect traps and fake nests, and planes!