Black-chinned Siskin
Spinus barbatus
The black-chinned siskin is 12 to 13 cm (4.7 to 5.1 in) long and weighs about 13 to 20 g (0.46 to 0.71 oz). The species is sexually dimorphic. Adult males have black lores, forehead, and crown. Their face is olive or green with a yellowish wash and a bright yellowish supercilium from behind the eye to the side of the neck. Their nape and back are olive green with thin dark streaks and their rump and uppertail coverts are yellow to yellowish green. Their tail is mostly black with yellow bases on all but the innermost pair of feathers. Their wings have a complicated pattern. Voice: The black-chinned siskin's song is "a loud series of musical phrases and trills" and sometimes includes call notes. Its calls include a "rising tsooeet", an "abrupt chit or chit-tip", a "more subdued tsi-tsi-tsi, together with a more prolonged twittering note", and "a short chup in flight".
ID text from Wikipedia, CC BY-SA 4.0
Hooded Siskin
Spinus magellanicus
The hooded siskin is 10 to 12 cm (3.9 to 4.7 in) long. and weighs about 11 g (0.39 oz). The species is sexually dimorphic. Adult males of the nominate subspecies S. m. magellanicus have an entirely black head, throat, and upper breast. They have a bright yellow collar on the nape and the sides of their neck. Their lower nape, back, and scapulars are olive green with faint dark streaks. Their rump is bright yellow and their uppertail coverts are olive green. Their tail is mostly black with wide deep yellow edges on all but the innermost pair of feathers. Their wings have a complicated pattern. Voice: The hooded siskin typically sings from an open perch and also in flight; it sings for long periods. Its song is "a varied series of rapid short twittering tseet-tseet, tseet-weet, or tseet-weet-a-weeta interspersed with repeated phrases; several males often sing in concert". Its calls include "a light or lilting djey, djey; tseeu; and a long trilling trrrrrr".
ID text from Wikipedia, CC BY-SA 4.0
Where you might meet both
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