Geographical distribution of Heermann's gull.    Migration  Year-round  Nonbreeding
Heermann's Gull (Larus heermanni), In Neotropical Birds Online (T. S. Schulenberg, Editor). Cornell Lab of Ornithology, Ithaca, NY, USA. retrieved from Neotropical Birds Online: https://neotropical.birds.cornell.edu/Species-Account/nb/species/heegul
Cephas