Species: Yellow-rumped Warbler, subspecies: Myrtle Warbler
Most recent capture date: 1/08/2022
Age: at least 1 and 1/2 years old
Sex: male
Notes: Yellow-rumped Warblers, or “butter-butts,” are our most numerous winter warbler. We get both the Audubon’s and Myrtle subspecies, as well as indeterminate birds that may be hybrids. This bird’s pale eyebrows are a specifically Myrtle trait. We also look at patterns of black and white on specific feathers to determine individuals’ age and sex.