Wintering Cranes

Whooping cranes and Sandhill cranes flying with legs and feet pulled up under their bodies, temperatures at the time were in the single digits.

January 24, 2019 – It is late January and temperatures have dipped into the single digits with wind chills sinking into the negative double digits, so why are there so many Sandhill cranes along with a small number of Whooping cranes still in Northwestern Indiana? Hundreds of Sandhill cranes are using an area a few miles Northwest of Jasper-Pulaski Fish & Wildlife Area, just south of the Kankakee river in the vicinity of a large power generating plant. According to Elisabeth Condon who is the Whooping Crane Outreach Coordinator for The International Crane Foundation in Baraboo Wisconsin, if the conditions are right for the cranes, both the Whooping cranes and Sandhill cranes, they may stay in a place like Northwestern Indiana where they can roost at night near the power station and feed in the corn fields and wet areas during the day. Condon also stated that there was a Whooping crane that wintered in Horican Wisconsin last year and survived the sub-zero temperatures.

A few miles southwest of the cranes roosting area I photographed two Whooping cranes flying with a small number of Sandhill cranes, all of those birds had their legs folded up under their bodies looking more like geese. This was an unusual sight for me, I have only observed the Sandhill cranes in less extreme winter condition where they always have their legs fully extended trailing behind. When questioned about the cranes pulling their legs and feet up under their bodies while flying, Condon explained this has been observed under the extremely cold conditions of winter, the cranes are just trying to keep their feet and legs warm, but also noted their legs extended in flight are used for control and balance.

A single adult Whooping crane surrounded by hundreds of Sandhill cranes feeding in the corn stubble of an agricultural field.

A scientific paper published in 2015, “Changes in the number and distribution of Greater Sandhill Cranes in the Eastern Population”, used data from the Christmas Bird Counts and Breeding Bird Surveys from 1966 – 2013. The paper explains not only the increase in the number of the eastern population of Sandhill cranes but also changes in cranes nesting, migration and wintering patterns. It seems that historic southbound migration staging areas for the cranes have become, when conditions are right, wintering grounds. The authors claim “Factors such as annual weather, long-term climate change, and changes in land use may influence future population trends and changes in both breeding and wintering ranges and are not mutually exclusive factors.” (Lacy et al. 324).

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