American Bushtit
Psaltriparus minimus
With a length of 100–110 mm (3.9–4.3 in) and a weight of 4.5–6 g (0.16–0.21 oz), the American bushtit is one of the smallest passerines in North America. It is mostly gray-brown, with a large head, short neck, long tail, and small, stubby beak. American bushtits have different characteristics based on their sex and habitats. The male has dark brown to black eyes while the adult female has yellow eyes.
ID text from Wikipedia, CC BY-SA 4.0
Black-throated Bushtit
Aegithalos concinnus
The black-throated bushtit is a small passerine, around 10.5 cm (4.1 in) long and weighing 4–9 g (0.14–0.32 oz). There is considerable racial variation in the plumage, but all subspecies have a medium length tail (as opposed to the long tail of the related long-tailed tit), a black throat and a black 'bandit mask' around the eye. The nominate race has a chestnut cap, breast band and flanks and dark grey back, wings and tail, and a white belly. The other subspecies have generally the same pattern (minus the chest band) but with grey caps or all grey bellies and flanks. Both sexes are alike.
ID text from Wikipedia, CC BY-SA 4.0
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