tags: White-tailed Hawk, Buteo albicaudatus, birds, mystery bird, bird ID quiz [Mystery bird] White-tailed Hawk, Buteo albicaudatus, photographed at the Attwater Prairie Chicken National Wildlife Refuge, Texas. [I will identify this bird for you in 48 hours] Image: Joseph Kennedy, 22 November 2009 [larger view]. Nikon D200, Kowa 883 telescope with TSN-PZ camera eyepiece 1/750s f/8.0 at 1000.0mm iso400. Please name at least one field mark that supports your identification. Review all mystery birds to date.