Blake Matheson:
Carduelis tristis
Blake Matheson:
Carduelis tristis II
Blake Matheson:
Fringilla montifringilla
Blake Matheson:
Loxia curvirostra
Blake Matheson:
Leucosticte tephrocotis tephrocotis
Blake Matheson:
Leucosticte tephrocotis littoralis
Blake Matheson:
Leucosticte tephrocotis
Blake Matheson:
Rhodopechys githaginea
Blake Matheson:
Fringilla coelebs
Blake Matheson:
Pyrrhula pyrrhula
Blake Matheson:
Carduelis carduelis
Blake Matheson:
Carduelis tristis III
Blake Matheson:
Serinus sulphuratus
Blake Matheson:
Serinus sulphuratus II
Blake Matheson:
Serinus canicollis
Blake Matheson:
Haemorhous mexicanus
Blake Matheson:
Coccothraustes vespertinus
Blake Matheson:
Loxia curvirostra minor