Peter J. A. Davidson

Bird Studies Canada

Many shorebirds (Order: Charadriiformes; Family: Charadriidae, Recurvirostridae, Scolopacidae, Haematopodidae, Jacanidae) are highly migratory, traversing thousands of kilometers between high latitude breeding and low latitude nonbreeding sites. In doing so, they are dependent on networks of coastal and interior wetland ecosystems. To aid in the ef...

Waterbirds are often used as indicators of ecosystem function across broad spatial and temporal scales. Resolving which species are declining and the ecological characteristics they have in common can offer insights into ecosystem changes and their underlying mechanisms. Using 20 years of citizen science data collected by the British Columbia Coast...

Three species of closely related woodpeckers (sapsuckers; Sphyrapicus) hybridize where they come into contact, presenting a rare 'λ-shape' meeting of hybrid zones. Two of the three arms of this hybrid zone are located on either side of the Interior Plateau of British Columbia, Canada bordering the foothills of the Coast Mountains and the Rocky Moun...

Many shorebird species undertake long-distance migrations punctuated by brief stays at food-rich, estuarine stopover locations. Understanding use of these food resources helps guide conservation and responsible development decisions. We determined the extent and degree to which Western Sandpiper (Calidris mauri) utilized biofilm as a food resource...

A figure delineating the major Salish Sea basins and depth habitats used as analysis units (Appendix S1); a table with the core taxa of the Salish Sea marine bird community and their dichotomously categorized foraging strategies, primary choices of prey, and local breeding status (Appendix S2); and time frames of monitoring programs within the basi...

Identifying drivers of ecosystem change in large marine ecosystems is central for their effective management and conservation. This is a sizable challenge, particularly in ecosystems transcending international borders, where monitoring and conservation of long-range migratory species and their habitats are logistically and financially problematic....

The cumulative impact of maritime oil pollution resulting from frequent but typically small oil discharges (i.e. <1000 L) is a significant issue worldwide, but this issue is difficult to address because of the size of the oil spills involved relative to the size of the environment into which they are released. Here we compare oil-spill patterns and...

In most of the world's coastal fisheries, bycatch of marine birds is rarely monitored, and thus the impact on populations is poorly known. We used marine bird strandings to assess the impact of entanglement in Pacific Northwest coastal net salmon fisheries. We compared the magnitude and species composition of fisheries-associated strandings (FAS) t...

The first dedicated, boat-based marine mammal surveys in Cambodian coastal waters were con-ducted over seven discrete survey periods, span-ning February to September 2001. These surveys covered the majority of Cambodian coastal waters, in addition to the main offshore islands. As a result of these surveys, ten marine mammal species have now been co...

Ornithological surveys were conducted over a seven-week period on Taliabu, Sula Islands, Indonesia in 1991, concentrating on eight species (seven of which have restricted ranges) considered (in 1991) to be threatened and six species (two of which have restricted ranges) considered near-threatened. All of the restricted-range species are dependent o...

The conservation status, distribution and habitat of two threatened bird species, Jerdon's Babbler Chrysomma altirostre and Rufous-vented Prinia Prinia burnesii, with special reference to Pakistan, are summarized. An account of observations of these relatively little-known species during a survey in Punjab and North-West Frontier Province, Pakistan...