Galapagos racer: Difference between revisions

The '''Galápagos racer''' ('''''Pseudalsophis biserialis''''' or '''''Philodryas biserialis''''') is a [[Colubrid]] snake in the genus ''[[Pseudalsophis]]'' which is endemic to the [[Galápagos Islands]]. It is a constrictor and only mildly venomous and is considered non-aggressive and harmless to humans. There are two subspecies: the Eastern and Western racer, the latter being larger, longer and darker than the Eastern variety. The Western subspecies also specializes in hunting fish, while both subspecies eat small reptiles, eggs, rodents and bird hatchlings. The Galapagos racer is [[near threatened]] due to recently introduced species that feed on snake eggs, including pigs, goats, and cats.<ref name=iucn/><ref>http://reptile-database.reptarium.cz/species?genus=Pseudalsophis&species=biserialis</ref><ref>http://galapagosconservation.org.uk/wildlife/galapagos-racer/</ref> It is one of only three species of snakes on the Galápagos Islands, and it was first described in 1860.<ref>Günther,A. 1860. On a new snake from the Galapagos islands. Ann. Mag. Nat. Hist. (3) 6: 78-79</ref><ref>Thomas, Robert A 1997. Galapagos terrestrial snakes: biogeography and systematics. Herpetological Natural History 5 (1): 19-40</ref> In November 2016 a video clip from the [[BBC]] series ''[[Planet Earth II]]'' showing several Galápagos racers hunting [[marine iguana]] hatchlings became viral.<ref>http://www.sciencealert.com/in-defence-of-racer-snakes-the-demons-of-planet-earth-ii?perpetual=yes&limitstart=1</ref>