Migration: mainly March–May, August–September. Breeding: common in riparian woodlands, foothills. Western North America to northwest Mexico. Indistinguishable from ruby-throated but distinctive male wing-buzz in flight louder (and lower pitched than Selasphorus).
And just like the majority of hummingbirds, females are larger compared to their male counterparts. Their small size makes them an easy prey to insect-eating birds and animals. Anna’s call is a smacking chip, Costa’s is a high, tinny tik, both distinct from black-chinned. The Black-chinned Hummingbird has a length of about 3.25-3.5 in and a weight of 0.1 to 0.2 ounces. It is the most common hummingbird around the cities of Lawton and Altus, and it has expanded its range eastward over the past three decades and is now common as far east as Chickasha. Female/immature Costa’s slightly smaller face often plainer wing tips often fall beyond tail tip at rest (shorter than tip on black-chinned). The Black-chinned Hummingbird is found in the western quarter of the state and is most common in the southwestern corner. Female/immature Anna’s slightly larger underparts more mottled, including undertail coverts (mostly whitish on black-chinned) throat often with rose-red spots wags tail infrequently. The black-chinned is often confused with Anna’s and Costa’s, which are chunkier and proportionately bigger headed, shorter billed, and shorter tailed lack the narrow inner primaries of Archilochus and molt wings in summer. Immature male: Throat usually has black-violet spots. Adult female: black-violet spots rare on throat. Adult male: black throat with violet-blue lower band. Age/sex differences as ruby-throated except as noted. Length 3.3–3.8" bill 16–22 mm.īest marks for all ages are narrow inner primaries and blunt primaries. The western counterpart of the ruby-throated, the black-chinned regularly pumps its tail.
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