Suomi: Magnus von Wrightin kuvasarjasta Skandinaviska fåglar, nro 46, kehrääjä ja sireenikiitäjä. Alkuperäisen kuvan omistaa Helsingin yliopisto. Kehrääjä saalistaa todellisuudessa lentämällä.
Public domain scan of print / book page depicting birds, ornithology, free to use, no copyright restrictions image - Picryl description
Carduelis flammea Common Redpoll Public domain scan of print / book page depicting birds, ornithology, free to use, no copyright restrictions image - Picryl description
Carduelis spinus ♀ English: Eurasian Siskin Deutsch: Erlenzeisig
Carduelis spinus ♂ English: Eurasian Siskin Deutsch: Erlenzeisig
Public domain photograph of zoological illustration, free to use, no copyright restrictions image - Picryl description
Picryl description: Public domain image of a bird in flight, free to use, no copyright restrictions.
Picryl description: Public domain image of a bird, free to use, no copyright restrictions.
Picryl description: Public domain image of a bird, eagle, free to use, no copyright restrictions.
Passer domesticus ♂ English: A drawing of a male House Sparrow by Wilhelm von Wright
Passer domesticus ♀ Public domain scan of print / book page depicting birds, ornithology, free to use, no copyright restrictions image - Picryl description
Sylvia borin Public domain scan of print / book page depicting birds, ornithology, free to use, no copyright restrictions image - Picryl description