Ruby-Throated Hummingbird or Black-Chinned Hummingbird?

Here's how to tell the difference

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Ruby-Throated Hummingbird

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Black-Chinned Hummingbird image 1
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Black-Chinned Hummingbird

Ruby-Throated Hummingbird

Archilochus colubris

General appearance

The ruby-throated hummingbird is a small bird with iridescent green plumage on its back and head, and white underparts. It has a slender, straight bill designed for feeding on nectar. Its wings are narrow and enable rapid, agile flight, making a buzzing sound that is often the first indicator of its presence in the wild.

Male vs female

Males are distinguished by their striking ruby-red throat patch, known as a gorget, which can appear black in poor lighting. Their tail feathers are forked with a dark, iridescent blue-green. Females lack the bright throat patch and instead have white underparts with a light spotting or streaking. Their tail feathers are rounded and edged with white.

Juvenile

Juveniles resemble adult females with similar green and white coloring. They lack the distinctive gorget of adult males. As they mature, young males begin to develop the red throat feathers that gradually replace the white of their juvenile plumage. Juveniles have buffy edges to their plumage, especially noticeable on the breast.

Size

2.8 - 3.9 in/0.1 - 0.2 oz

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How to tell the Ruby-Throated Hummingbird from the Black-Chinned Hummingbird

Visual differences

The Ruby-Throated Hummingbird and Black-Chinned Hummingbird present distinct visual differences. The male Ruby-Throated features a vibrant ruby-red throat, while the male Black-Chinned shows a subtle black chin with a purple band, discernible only in optimal lighting. Generally, Ruby-Throated Hummingbirds exhibit iridescent green backs and forked tail feathers edged with white (in females), whereas Black-Chinned birds have a prominent white collar and a multi-pointed tail. Both have slender bills, but Ruby-Throated males have more striking color variations. Size is similar, with both approximately 3-4 inches long.

Key differences and behavior

The Ruby-Throated Hummingbird and Black-Chinned Hummingbird share overlapping behaviors but have some distinctions. Both species engage in similar courtship displays, involving U-shaped arcs and whirring sounds. However, Ruby-Throats prefer semi-open woods and gardens, while Black-Chins thrive in semi-arid areas and move to mountains post-breeding. Both females build well-camouflaged nests, typically higher for Ruby-Throats (10-20 feet) than Black-Chins (4-8 feet). Their diets are similar, mainly nectar and insects, with both utilizing sugar-water feeders. Size-wise, Ruby-Throats are slightly lighter, weighing 2-6g (0.07-0.21 oz) compared to Black-Chins' 2.5-5.1g (0.09-0.18 oz). The overall subtle differences in habitat preference and subtle variances in nesting heights are key behavioral indicators for identification.

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