found: Cklist. No. Amer. birds:p. 173 (Haematopus ostra legus; Eurasian oystercatcher)
found: ITIS, Apr. 4, 2005(Haematopus ostralegus Linnaeus, 1758 -- valid -- eurasian oystercatcher)
found: Avibase, via WWW, Apr. 4, 2005(Eurasian Oystercatcher (Haematopus ostralegus) Linnaeus, 1758. English: Common Oystercatcher, Eurasian Oystercatcher, European Oystercatcher, Northern Oystercatcher, Northern Pied Oystercatcher, Oystercatcher, Palaearctic Oystercatcher, Pied Oystercatcher, Sea Pie)
found: Annotated list of shorebirds (waders) of the world, via WWW, Apr. 4, 2005(Eurasian Oystercatcher (Haematopus ostralegus))
found: The A.O.U. check-list of North American birds, 7th ed., via WWW, Apr. 6, 2005(Haematopus ostralegus, Eurasian Oystercatcher)