Heermann's Gull (Larus heermanni) eggs laid on their breeding grounds on Isla Rasa in the middle Gulf of California (Sea of Cortez), Mexico

heermanns gull larus heermanni isla rasa gulf of california sea cortez mexico bird birds aves charadriiformes seabird seabirds gulls lari laridae oocean oceanic marine america american north america north american us united states heermans eggs two pair nest spotted black and white