Anser cygnoides x anser
Status: No accepted records.
Comments: There are two reports, both presumably of released or escaped hybrids from domestic stock. A flock of 12 appeared around 2008 at Fremont Lakes SRA, Dodge Co; three remained Nov 2015 and one female on 26 Feb 2021 (Charlotte Croshaw, pers. comm.; eBird.org). One was at Ta-Ha-Zouka Park, Madison Co., 16 Dec 2020-13 Jan 2021(eBird.org).
All domestic geese breeds are descended from Swan Geese and Graylag Geese (Bird Hybrids: Swan Goose x Greylag Goose); in Nebraska intergrades of these species are often found in parks, although “Given the highly variable appearance of domestic geese it is often impossible to determine whether an individual bird is pure Greylag Goose, pure Swan Goose or a mix of both” (Bird Hybrids: Swan Goose x Greylag Goose). White park geese are thought by some to be pure Swan (aka Chinese) Geese despite their orange bills (Bird Hybrids: Swan Goose x Greylag Goose).
Photograph (top) by Charlotte Croshaw of a Swan Goose x Graylag Goose (hybrid) at Fremont Lakes SRA, Dodge Co 7 May 2019.
Silcock, W.R., and J.G. Jorgensen. 2021. [Swan x Graylag Goose] (hybrid) (Anser cygnoides x anser). In Birds of Nebraska — Online. www.BirdsofNebraska.org
Updated 23 Apr 2021