Black-bellied Tree-duck

tags: Black-bellied Whistling-duck, Black-bellied Tree-duck, Dendrocygna autumnalis, birds, mystery bird, bird ID quiz [Mystery bird] Black-bellied Whistling-duck, also known as the Black-bellied Tree-duck, Dendrocygna autumnalis, photographed in Hermann Park Conservancy, Houston, Texas. [I will identify this bird for you in 48 hours] Image: Joseph Kennedy, 18 November 2009 [larger view]. Nikon D200, Kowa 883 telescope with TSN-PZ camera eyepiece 1/640s f/8.0 at 1000.0mm iso400 Please name at least one field mark that supports your identification. Review all mystery birds to date.