1
by Oates, John F.
Published 2004
Conservation International Wildlife Conservation Society

3
by Rodrigues, Ana S. L.
Published 2003
Conservation International

5
Published 2007
Conservation International

6
Published 2007
Conservation International

8
Published 2006
American Ornithologists' Union

11
Published 2007
American Ornithologists' Union

12
Published 2008
The American Society of Plant Biologists

15
by James, Frances C.
Published 2009
American Ornithologists' Union

16
Published 2010
American Ornithologists' Union

17
Published 2010
American Ornithologists' Union

20
by Brown, Charles Robert
Published 2011
American Ornithologists' Union