Laughing Gull (Leucophaeus atricilla) Science Article 2 abstract Lead concentrations were measured in eggs, prefledglings and adult laughinggulls collected near Galveston, Texas. No lead was found in eggs. Prefledglingand adult birds had lead ranging from zero to 16 itg/g wet tissue. Liver had thegreatest lead concentrations followed by brain, heart and skeletal muscle. Therewere no […]
Category: North America
Nesting success and status of the least tern breeding colony at gibson lake in southwestern indiana
Least Tern (Sternula antillarum) Science Article 6 abstract Federally-endangered interior least terns (Sterna antillarum) have nested at Gibson Lake in southwestern Indiana since 1986. In 2003 and 2004 we evaluated nesting success of least terns and identified factors influencing their productivity at Gibson Lake . In 2003 least terns nested only at secondary breeding sites, […]
The timing of pair formation in harlequin ducks
Harlequin Duck (Histrionicus histrionicus) Science Article 1 abstract The timing of pair formation varies within and among species of ducks. In this study we documented the chronology of pair formation in a population of wintering Harlequin Ducks (Histrionicus histrionicus) in southwestern British Columbia. Harlequin Ducks began forming pair bonds in October and over half of […]
A vagrant Laughing Gull (Larus africilfa) from Pitcairn Island
Laughing Gull (Leucophaeus atricilla) Science Article 3 abstract During mid-March 1992, I discovered the remains of a Laughing Gull (Lamatricilla) at Down Rope Beach, Pitcairn Island. It appeared to have beendead for approximately one month. The distance from Pitcairn Island tothe wintering grounds of this North American gull is over 5,000 km GRAHAM WRAGG, NOTORNIS […]
The spring moult of larus atricilla linn.
Laughing Gull (Leucophaeus atricilla) Science Article 1 abstract The subject of the alleged color change in full-grown feathers in certain specific cases, would seem hardly worthy of renewed comment after the thorough papers of Allen and Chapman in the ‘Bulletin’ of the American Museum, Vol. VIII, 1896, pp. 1-44, and of others since then. But […]
Origin and movements of Grey Plovers Pluvialis squatarolaringed in Germany
Grey Plover (Pluvialis squatarola) Science Article 3 abstract The general migration routes of waders using the East Atlantic flyway are reasonably wellknown. However, detailed studies on the migration routes and the origin of Grey Ploversstaging along the German coasts are very limited. Klaus-Michael Exo & Svea Wahls, Wader Study Group Bull. 81: 42-45. 1996 Download […]
Moult, mass and migration of Grey Plovers Pluvialis squatarola wintering in South Africa.
Grey Plover (Pluvialis squatarola) Science Article 2 abstract Data on 355 Grey Plovers Pluvialis squatarola trapped in South Africa in 1971-1997 were used to describe seasonal body mass variation and moult in relation to their very long migrations. The estimated duration of adult primary moult, 131 days, was similar to that observed in India and […]
Natural Infection of a Great Egret (Casmerodius albus) with Eastern Equine Encephalitis Virus
Great Egret (Casmerodius albus) Science Article 1 abstract In July 2001, a great egret (Casmerodius albus) was found dead in CharltonCounty, Georgia (USA) and submitted to the Southeastern Cooperative Wildlife Disease Study Nicole L. Gottdenker et al, Journal of Wildlife Diseases, 39(3), 2003, pp. 702-706 Download article download full text (pdf)
Water depth selection during foraging and efficiency in prey captureby the egrets Casmerodius albus and Egretta thula (Aves, Ardeidae)in an urban lagoon in Rio de Janeiro State, Brazil
Great Egret (Casmerodius albus) Science Article 2 abstract This study aimed to evaluate the water depth selection during foraging, the efficiency in prey capture, and the food items captured by Casmerodius albus (Linnaeus, 1758) and Egretta thula (Molina, 1782). The work was conducted at an urban lagoon, Lagoa Rodrigo de Freitas, Rio de Janeiro Aline […]
Rejection of artificial parasite eggs by gray kingbirds in the bahamas
Grey Kingbird (Tyrannus dominicensis) Science Article 1 abstract We added artificial Shiny Cowbird (Molothrus bonariensis) eggs to Gray Kingbird (Tyrannus dominicensis) nests in the Bahamas, where Shiny Cowbirds were first recorded in 1993. Gray Kingbirds ejected 85% of artificial eggs within 48 hr of addition. Based upon the short time of contact between the two […]