Black-capped Siskin (Spinus) [XC880309]
by Peter Boesman from Uni\u00f3n Reforma, San Marcos, Guatemala (call)
Black-capped Siskin (Spinus) [XC34082]
by id from Fuentes Georginas, Quetzaltenango, Guatemala (call)
Subspecies
No subspecies.
Thought to form a superspecies with Pine Siskin (Spinus pinus) and Eurasian Siskin (Spinus spinus). Hybridizes with Pine Siskin (Spinus pinus) of southern subspecies perplexa, progeny showing intermediate characters; may be conspecific, but extent of reproductive isolation between these two taxa requires further research.