The golden-crowned kinglet (Regulus satrapa) is a very small songbird in the family Regulidae that lives throughout much of North America.
Adults are olive-gray on the upperparts with white underparts, with thin bills and short tails. They have white wing bars, a black stripe through the eyes and a yellow crown surrounded by black.
The adult male has an orange patch in the middle of the yellow crown. The juvenile is similar to the adult, but with a browner back and without the yellow crown.
This is one of the smallest passerines in North America. Its length, at 8 to 11 cm (3.1 to 4.3 in), is probably the shortest of any American passerine.
However, its weight, which averages around 5.9 g (0.21 oz), with a range of 4 to 7.8 g (0.14 to 0.28 oz), is marginally more on average than the American bushtit and black-tailed gnatcatcher.[5] The golden-crowned kinglet has a wingspan of 5.5-7.1 in (14-18 cm).
The golden-crowned kinglet forages actively in trees or shrubs, mainly eating insects, insect eggs and spiders. It produces a series of high-pitched calls on a single note, and tends not to fear human approach. Its nest is a well-concealed hanging cup suspended from a conifer branch.