Half-collared Sparrow vs Olive Finch

Half-collared Sparrow

Arremon semitorquatus

Small28 gForest

The half-collared sparrow is about 15 cm (5.9 in) long and weighs 22 to 28 g (0.78 to 0.99 oz). The species is sexually dimorphic but not dramatically so. Adult males have a black crown with a gray stripe through its middle, black lores, and a white supercilium that extends to the nape. The rest of their face is black. Their nape and the sides of their neck are gray. Their upperparts, wings, and tail are mostly greenish olive with somewhat more yellowish green on the lesser wing coverts. They have a white throat. Voice: One song of the half-collared sparrow is "a high-pitched series of three whistles, each whistle descending in frequency, and each lower in pitch than previous one, tzee–tzeuuu-tzééúúúú". Another has "an up-down, up-down pattern, swee-swóóó swee-swóóó". Its call is a metallic "sharp ringing tiip".

ID text from Wikipedia, CC BY-SA 4.0

Photo: Daniel S. Katz · CC BY 4.0

Olive Finch

Arremon castaneiceps

Small37 gForest

The olive finch has olive green plumage with a chestnut crown and nape. The face and throat are dark gray, and the wings and tail are darker in color than the rest. The tail is more rounded compared to other Arremon species. A juvenile olive finch presents similarly to adults but with a duller crown, olive throat and face, and uneven plumage coloration. More specific information on the bird's molt and its timing is not available for this species. It has a brown or dark brown iris, black or dark gray bill, and black tarsi and toes. The olive finch has a length of 15.5-16.

ID text from Wikipedia, CC BY-SA 4.0

Photo: Ana Agreda, Aves y Conservación · Public domain

Photos and recordings are credited to their authors under the licence shown. Full profiles: Half-collared Sparrow and Olive Finch.