Geographical distribution of Franklin's gull.    Breeding  Migration  Nonbreeding
Franklin's Gull (Leucophaeus pipixcan), 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/fragul
Cephas