** {{en}} [http://www.eswr.com Endangered Species & Wetlands Report] Buletin tentang ''Endangered Species Act'' dan lahan basah
** {{en}} [http://www.esasuccess.org/reports/ Kisah sukses ''Endangered Species Act'']
** {{en}} [http://digital.library.unt.edu/govdocs/crs/search.tkl?q=endangered+species&search_crit=subject&search=Search&date1=Anytime&date2=Anytime&type=form Laporan Congressional Research Service (CRS) tentang spesies terancam]
* Basis data
** {{en}} U.S. Fish & Wildlife Service. [http://ecos.fws.gov/tess_public/TESSWebpage Threatened and Endangered Species System (TESS)]
** {{en}} [http://www.cites.org/eng/resources/species.html Basis data CITES]
** {{en}} [http://www.earthsendangered.com Spesies terancam menurut benua, wilayah, dan negara]
** {{en}} [http://www.sinapu.org/ Karnivora asli di selatan Pegunungan Rocky]
** {{en}} [http://archives.cbc.ca/IDD-1-75-1391/science_technology/endangered_species/ CBC Digital Archives] Spesies terancam di Kanada
* Artikel dan buku
** {{en}} [http://www.newscientist.com/channel/life/endangered-species Everything you wanted to know about endangered species] Situs majalah ''[[New Scientist]]''.
** {{en}} [http://news.bbc.co.uk/2/hi/science/nature/4013719.stm "Science counts species on brink"]. (Nov 17, 2004). ''BBC News''.
** {{en}} [http://www.dbc.uci.edu/~sustain/bio65/Titlpage.htm ''Biodiversity and Conservation''] Buku online oleh Peter J. Bryant
** {{en}} [http://www.fao.org/docrep/004/T0559E/T0559E00.htm#TOC ''In situ conservation of livestock and poultry''] Buku online FAO
