Nest predation among vegetation layers and habitat types: revising the dogmas.

摘要: Greater nest predation rates on ground-nesting birds than off-ground-nesting have long been assumed and used as an explanation for patterns such greater cryptic monomorphic coloration of area sensitivity population decline many Neotropical migrant species. I use three independent data sets to show that this assumption is not true in forest habitats, where instead least birds. Larger clutch sizes longer nestling periods species habitats are indirect evidence suffered lower over evolutionary time. In contrast, seem suffer shrub grassland but evaluation complicated by habitat disturbance studies. Nesting mortality general appears be these showing some the most consistent long-term declines. Additional examination nesting coexisting various ecological conditions needed uncover may influence evolution life-history traits demographies.