Species: Chestnut-backed Chickadee
Most recent capture date: 5/08/2022
Age: at least one year old

Notes: This bird has some unusual white feathers; the technical term for this is “leucistic”. Leucisticism can have a variety of causes. We see it especially in the chickadees at our Jasper Ridge site, and we know that in at least one case a bird was leucistic in one year but normally pigmented in the next, so we suspect this is affected by the conditions the bird experiences while growing the feathers.