Foraging by Passerine birds and Anolis lizards on St. Eustatius (Neth. Antilles): implications for interclass competition, and predation

摘要: Observations of foraging and diet for eight Passerine bird, two Anolis lizard, one Ameiva lizard species in dry sclerophyll scrub on St. Eustatius (Neth. Antilles) show that none the bird competes as much with either anole does other anole, or Ameiva. Anoles feed insects, primarily ground low vegetation; no mainly insectivorous feeds these places. Instead, main presentday interaction between birds anoles is predation. The abundant pearly-eyed thrasher (Margarops fuscatus) sparrow hawk (Falco sparverius) are major predators anoles. This predation has little effect niche relations anoles, according to a model coevolution competing species.