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In Europe, the Case of the Missing Sparrows
http://www.csmonitor.com/2002/1227/p01s03-woeu.html
Article from the Christian Science Monitor about the decline of House Sparrows.
Missing! - Ten Million House Sparrows
http://www.bto.org/appeals/house_sparrow.htm
Information on House Sparrow decline from The British Trust for Ornithology.
Passer domesticus
http://nzbirds.com/Sparrow.html
New Zealand introduced bird, the House Sparrow.
Red-headed Weaver (Anaplectes rubriceps)
http://www.kenyabirds.org.uk/red-headed_weaver.htm
Photograph of this species plus brief facts.