Pica hudsonia (Italian Wikipedia)

Analysis of information sources in references of the Wikipedia article "Pica hudsonia" in Italian language version.

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animaldiversity.org

Olson, S., Pica hudsonia (On-line), su Animal Diversity Web, 2012. URL consultato il 5 maggio 2018.

(EN) Black-billed Magpie (Pica hudsonia), su Handbook of the Birds of the World. URL consultato il 5 maggio 2018.
Boesman, P., Notes on the vocalizations of Black-billed Magpie (Pica hudsonia) and Yellow-billed Magpie (Pica nutalli), in HBW Alive Ornithological Note, n. 207, 2016.

(EN) BirdLife International 2012, Corvus monedula, su IUCN Red List of Threatened Species, Versione 2020.2, IUCN, 2020.

(EN) F. Gill e D. Donsker (a cura di), Family Corvidae, in IOC World Bird Names (ver 9.2), International Ornithologists’ Union, 2019. URL consultato il 5 maggio 2018.