A slate-colored junco awaits release back into the forest after biologists at Creamer's Field Migration Station noted it was their 2,000th songbird capture of the season.
“Sometimes they just feel a little heavier in your hand,” said Snowden, program director for the Creamer’s Field Migration Station. Snowden works for the Alaska Songbird Institute, a Fairbanks nonprofit organization supported by local members and donors. Among those banding birds at the Creamer’s Field Migration Station this fall were, from left, intern Alex Pearce, volunteer bander Laurel Devaney, educator and outreach coordinator Georgia Houde, program director Robert Snowden, intern Sarah Kennedy, and seasonal bander Larissa Babicz.
in which people vote on their favorite rotund Katmai grizzly bear — inspired Snowden to initiate a Fat Bird Week on the migration station’s social media accounts.During the last few weeks, Snowden and his bird-capturing partners have featured slate-colored juncos who were among the heaviest they have ever captured at the station. Also featured were a few orange-crowned warblers “bulging with fat” and a fox sparrow so bulked up it was one of the heaviest ever recorded at the station. .
The bird banders rank each bird they capture for fat condition, with zero being almost none to seven being akin to the bear stuffed with the most Katmai salmon. How do they know that? Up to 90% of the juncos, warblers and thrushes captured at the mist-netting station are birds that hatched from eggs in the summer of 2023. That they know they are flying to Mexico or North Carolina despite never having landed there is one of nature’s great mysteries. But a new junco seems to know that late August and September is the time to gorge on all the insects and seeds it can find.
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