Seasonal changes in abundance of bird species on an ArabianAcaciaplain

Abundance and diversity of small-bird assemblages in the Monte desert, Argentina

“…The first species does not breed in the Monte desert; it is a transient migrant that was captured in great numbers from late October to early November. No other species showed this behavior, in contrast with other temperate deserts where transient migrants can be a major component of bird assemblages (Newton and Newton, 1997;Wardman and Warrington, 1997;van Heezik and Seddon, 1999). On the other hand, P. ornata is a nomadic species that can breed in some years in high densities in a locality, and be completely absent the next breeding season in the same place (Marone, 1992;Blendinger, 2000).…”