Plural of chickadee; small gray and black North American birds known for their distinctive 'chick-a-dee-dee-dee' call.
From chickadee (singular), an imitative word derived from the bird's call, first recorded in American English around 1816. The call itself inspired both the common name and the scientific recognition of these songbirds.
Chickadees can memorize thousands of hiding spots where they've stashed seeds during winter—they have brains that actually grow 30% larger in fall to handle all that spatial memory, then shrink again in spring. That's why their call name is so fitting: it's like they're calling out their own identity while remembering where they buried treasure.
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