The first physiological cue for migration is the adjustments in the day size. These improvements are linked to hormonal adjustments while in the birds. While in the period just before migration, several birds Screen bigger activity or Zugunruhe (German: migratory restlessness), initially explained by Johann Friedrich Naumann in 1795, along https://petfoodcostuae83714.blogmazing.com/36663238/everything-about-bird-ownership-checklist-uae