Petrochelidon pyrrhonota

tags: Cliff Swallow, Petrochelidon pyrrhonota, birds, mystery bird, bird ID quiz [Mystery birds] Cliff Swallow, Petrochelidon pyrrhonota, photographed at Attwater Refuge, Texas. [I will identify this bird for you tomorrow] Image: Joseph Kennedy, 30 May 2009 [larger view]. Nikon D200 ,Kowa 883 telescope with TSN-PZ camera eyepiece 1/350s f/8.0 at 1000.0mm iso400. Please name at least one field mark that supports your identification. Review all mystery birds to date.