Costa's Hummingbirds are small and compact hummingbirds with a hunched posture. Their short tail barely meets their short wings when perched. The male's gorget (throat patch) flares out along the sides of the neck like an overgrown mustache.
Larger than a Calliope Hummingbird, smaller than an Anna's Hummingbird.sparrow-sized or smaller
- Both Sexes
- Weight: 0.1-0.1 oz (2-3 g)