Leap Frog Migration

{
  "id": "MLC-T-ENV-015551",
  "term": "Leap Frog Migration",
  "field": "Environment",
  "definition": "A pattern of migration taken when subspecies of the same species occupy two or more breeding areas (and also wintering areas) in the axis of migratory flight. Subspecies that breed progressively closer to one end of the axis winter progressively closer to the other end. An example is the Fox Sparrow, of which six subspecies inhabit the Pacific coast of North America. On its migration south, each subspecies flies over winter areas already occupied by the subspecies that breeds south of it (Welty 1975:472).",
  "references": [
    "USGS Northern Prairie Wildlife Research Center Glossary of Avian Terms For Use in Avian Conservation Biology"
  ],
  "url": "https://mlchart.com/terminology/environment/leap-frog-migration/"
}