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Commonness of not-so-common birds: the need for baseline knowledge of actual population size for the validation of population size predictions

Guillermo Blanco, Auteur ; Oscar Frias, Auteur ; Jesus A. Cuevas, Auteur ; Jose L. Gonzalez, Auteur ; Felix Martinez, Auteur

Dans Bird Study (61(3) 2014)

Capsule The hypothesized regional population size of a common species in Spain was found to be unreliable when compared with a complete and simultaneous single-species direct census. Aims To provide a regional census of Eurasian Jackdaws Corvus [...]

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