BIOtheNUMBERS » aridland birds http://biothenumbers.com Wed, 11 Nov 2009 23:43:01 +0000 en hourly 1 http://wordpress.org/?v=3.0 Aridland Birds http://biothenumbers.com/index.php/2009/04/15/aridland-birds/ http://biothenumbers.com/index.php/2009/04/15/aridland-birds/#comments Wed, 15 Apr 2009 15:44:28 +0000 Earth Stats http://biothenumbers.com/?p=20 Condor

39% of aridland birds are species of conservation concern, including 10 federally listed as endangered or threatened. These species are especially vulnerable because of their small ranges or restricted habitat requirements, or both.

60% of all aridland species and 76% of aridland obligate species have declined.

More than 50% of aridland birds are permanent residents of the U.S. borderlands.

174 condors are flying free, and the number is expected to grow each year.

Data: FWS

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