Least Tern (Sternula antillarum) Science Article 3 abstract The annual hydrograph of large rivers, including flood pulses and low-flow periods, is believed to play a primary rolein the productivity of biota associated with these ecosystems. We investigated the relationship between riverhydrology and Interior least tern (Sterna antillarum) reproductive success on the Lower Mississippi River from […]

Least Tern (Sternula antillarum) Science Article 2 abstract DNA sequence variation from two nuclear introns and part of the mitochondrial cytochromebgenewere used to evaluate population structure among three subspecies of Least Tern that nest in the United States (California[Sterna antillarum browni], Interior [S. a. athalassos], Eastern [S. a. antillarum]). Sequence variation was highestfor nuclear intron […]

Least Tern (Sternula antillarum) Science Article 4 abstract The Atlantic race of the Least Tern (Sterna antillarum antillarum) breeds along the coastal beaches and bay systems of the Atlantic Ocean and Gulf of Mexico from Maine to southern Texas, while the Interior Least Tern (S. a. athalassos) breeds in the interior of the United States […]

Least Tern (Sternula antillarum) Science Article 5 abstract Predation is difficult to observe and quantification of impacts have consequentlybeen difficult, especially for predators active at night. Using night-capable camerasplaced throughout a California least tern (Sternula antillarum browni) colony I examinedrates of predation by a complex of potential predators. I identified and quantified directand indirect effects […]

Large-billed Tern (Phaetusa simplex) Science Article 1 abstract Nests of Black Skimmers (Rynchops niger) (n = 37), Large-billed Terns (Phaetusa simplex) (n = 121), and Yellow-billed Terns (Sterna superciliaris) (n = 16) on an exposed sandbar in the Trombetas River, Brazil, were monitored during incubation and hatching in 1982. The species were interspersed throughout the […]

Ivory Gull (Pagophila eburnea) Science Article 1 abstract Ivory gulls in western Baffin Bay and eastern Lancaster Sound were studied in 1976, 1978 and 1979 using aerial surveys. uring September and October concentrations of hundreds of ivory gulls occurred along glacier fronts on southeast Ellesmere and northeast and southeast Devon islands, and where offal was […]

Grey-hooded Gull (Chroicocephalus cirrocephalus) Science Article 1 abstract The Grey-hooded Gull (Larms cirrocephalus) is known to breed at only one locality west of the Andes, a small coastal pond named Laguna Chica in the Departamento de lea, Peru (Tovar and Ashmole, Condor 72:119, 1970). We report here a second and larger colony, 56 km north […]

Great Black-backed Gull (Larus marinus) Science Article 1 abstract Until now 59 Great Black-backed Gulls have been recorded on the territory of Bulgaria, mainly during the seasonal migrations and in winter. They prefer the sea coast, seldom they visit the inland reservoirs. The first autumn migrants reach the Black Sea after September 6th. A new […]

Franklins Gull (Leucophaeus pipixcan) Science Article 1 abstract Carotenoid pigments produce the red, orange, and yellow plumage of many birds. Carotenoidcontainingfeathers are typically rich in color and displayed by all adult members of the species. In many gulls andterns, however, an unusual light pink coloring (or flush) to the normally white plumage can be found […]

European Herring Gull (Larus argentatus) Science Article 5 abstract Several species of large white-headed gulls, genus Larus, often hybridize freely where they occur sympatrically (Ingolfsson 1987, Pierotti 1987, Spear 1987, Pierotti & Annett 1993). In the Ebro Delta (Ebro Delta National Park, 40