• Publications
  • Influence
Geometry of visual recruitment by seabirds to ephemeral foraging flocks
Using geometric relationships, we calculate theoretical upper (20-30 km) and lower (0.7-6.2 km) limits to horizontal distances over which volant seabirds can be visually recruited to join Type IExpand
Polar Bear Conservation in Canada: Defining the Policy Problems
Conservation of polar bears (Ursus maritimus) in Canada is based on the goals and principles of the 1973 International Agreement on the Conservation of Polar Bears and Their Habitat, and has longExpand
Evidence for the Species Status of the Bahama Yellow-Throated Warbler (Dendroica “Dominica” Flavescens)
Flavescens satisfies the requirements of both the biological and phylogenetic species concepts, and is recommended to be reclassified as a separate species, the Bahama Warbler (Dendroica flavescens). Expand
Polar bears and CITES: A rejoinder to Parsons and Cornick
In 2010 a US proposal to uplist polar bears to Appendix I of CITES was rejected. Parsons and Cornick (2011, [1]) critiqued this decision and the IUCN/TRAFFIC analysis that supported it. TheirExpand
Foraging over Sargassum by Western North Atlantic Seabirds
Conservative analysis and extensive observational data indicate the Sargassum community is critical for feeding for some western North Atlantic seabirds, including Atlantic tropicbirds and Masked Boobies. Expand
Population Estimates, Conservation Concerns, and Management of Tropicbirds in the Western Atlantic
Two species of tropicbirds (Phaethontidae) live in the Western North Atlantic. The White- tailed Tropicbird of the region is an endemic race, Phaethon lepturus catesbyi, with approximately 5000Expand