22
Published 2006
Conservation International

24
Published 2007
Conservation International

27
Published 2009
Conservation International

28
Published 2009
Conservation International

29
Published 2009
Conservation International

30
Published 2013
Conservation International

32
by Oates, John F.
Published 2004
Conservation International Wildlife Conservation Society

34
by Rodrigues, Ana S. L.
Published 2003
Conservation International

35
Published 2007
Conservation International

36
Published 2007
Conservation International

37
Published 2007
Conservation International

39
Published 2006
American Ornithologists' Union