Black-capped gnatcatcher (English Wikipedia)

Analysis of information sources in references of the Wikipedia article "Black-capped gnatcatcher" in English language version.

refsWebsite

Global rank English rank

2^nd place

88^th place

160^th place

1,007^th place

1,255^th place

doi.org

BirdLife International (2021). "Polioptila nigriceps". IUCN Red List of Threatened Species. 2021: e.T22711594A139561021. doi:10.2305/IUCN.UK.2021-3.RLTS.T22711594A139561021.en.
Atwood, J. L. and S. B. Lerman (2020). Black-capped Gnatcatcher (Polioptila nigriceps), version 1.0. In Birds of the World (J. del Hoyo, A. Elliott, J. Sargatal, D. A. Christie, and E. de Juana, Editors). Cornell Lab of Ornithology, Ithaca, NY, USA. https://doi.org/10.2173/bow.bkcgna.01 retrieved 29 May 2021

Gill, F.; Donsker, D.; Rasmussen, P. (January 2021). "IOC World Bird List (v 11.1)". Retrieved 14 January 2021.