Vilniaus universiteto Ekologijos institutas. – Vilnius : Vilniaus universiteto Ekologijos institutas. Mečislovas Žalakevičius, Irena Žalakevičienė. 2009.
Philippine Hawk-Eagle — Conservation status Vulnerable ( … Wikipedia
Philippine Hawk-eagle — Taxobox name = Philippine Hawk eagle status = VU | status system = IUCN3.1 status ref = [ BirdLife International 2004. [http://www.iucnredlist.org/search/details.php/20660/all Spizaetus philippensis] . [http://www.iucnredlist.org 2006 IUCN Red… … Wikipedia
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Javan Hawk-Eagle — Conservation status … Wikipedia
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Wallace's Hawk-Eagle — Conservation status Vulnerable (IUCN 3.1)[1] … Wikipedia
