ABSTRACT A growing body of work suggests that breeding birds have a significant capacity
to assess and respond, over ecological time, to changes in the risk of predation to both …

Behavioral ecologists generally agree that animals derive benefits from familiarity with
spaces that they inhabit or visit, yet site familiarity is rudimentary or lacking in most models of …

ECOLOGY Population status of North American grassland birds from the North American
Breeding Bird Survey, 1966-1996................................................. Bruce G. Peterjohn and John …

Habitat fragmentation has been implicated as a major cause of population decline in
grassland birds. We tested the hypothesis that a combination of area and shape determines …

The nature and extent of population regulation remains a principal unanswered question for
many types of organisms, despite extensive research. In this paper, we provide a new …

I studied 787 female and 510 male Prothonotary Warblers (Protonotaria citrea) breeding in
southern Illinois, USA, from 1994 to 2000 to test two competing hypotheses that may explain …

Classical models of breeding habitat selection rarely deal with the question of information
gathering for patch quality assessment. In this paper, we present two models comparing the …

Based on more than 300 individually marked American Robins (Turdus migratorisu) and
Brown Thrashers (Toxostoma rufum), I tested three hypotheses to explain low return rates of …

Vol. No. April evidence for area sensitivity in grassland birds?() What are the
historical explanations for area sensitivity?() What ecological processes could produce …

Bird use of Conservation Reserve Program (CRP) and row-crop fields was studied in central
Iowa from May through July 1991-1993. Thirty-three bird species were recorded in CRP …