Larus argentatus x hyperboreus Status: Rare casual in winter Records: The only documented records are: 26 Feb 1994 Lake Ogallala, Keith Co (Silcock and Rosche 1994, Gubanyi 1996, Brogie 1998) 29 Mar 2020 Calamus Reservoir, Loup Co (Arthur, eBird.org). 3 Apr 2014 N.P. Dodge Park, Omaha, Douglas Co Comments: This hybrid, often referred to as […]