Two birdbanders examine the fat content of a brown thrasher. Birds store fat at the top of their breast, and the amount of fat a bird is storing offers clues to determine if the bird is getting ready to migrate, is in the process of migrating or has already migrated. Heard Museum, McKinney, Texas. 6x7 film scan.
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1 Comment
Thanks for explanation. I thought they're burning it with a cigarette :o