Black-headed siskin

The black-headed siskin (Spinus notatus) is a species of finch in the family Fringillidae. It is found in Mexico, Belize, El Salvador, Guatemala, Honduras, and Nicaragua. Its natural habitats are subtropical or tropical moist montane forest and heavily degraded former forest.

Black-headed siskin
Conservation status
Least Concern  (IUCN 3.1)[1]
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Aves
Order:	Passeriformes
Family:	Fringillidae
Subfamily:	Carduelinae
Genus:	Spinus
Species:	S. notatus
Binomial name
Spinus notatus (Du Bus de Gisignies, 1847)
Synonyms
Carduelis notata

Evolution and systematics

Recent work suggests the species radiation happened much later, within the last 1 million years, and posits the radiation happened due to climate change in the late Pleistocene. The changing climate could have fragmented various habitats in the Andes, initiating allopatric speciation.^[2]

Spinus notatus passing the Isthmus of Panama when it was closed