Great Blue Heron (Ardea herodias) Science Article 6 abstract On April 7, 2000, approximately 126,000 gallons of a mixture of #2 and #6 fuel oil were released froma break in a pipeline providing fuel to the Chalk Point Generating Station. The pipeline is owned by thePotomac Electric Power Company (PEPCO) and operated by Support Terminal […]
‘PRACTICE’ FORAGING BY A SUB-ADULT GREAT BLUE HERON
Great Blue Heron (Ardea herodias) Science Article 13 abstract ‘Play’, including ‘practice’ aggression and foraging, has been reported in at least 14orders of birds (Fagen 1981), and is thus a widespread, if relatively rare, behavior amongbirds. I report here on observations of practice foraging behavior (considered a categoryof play) by a sub-adult Great Blue Heron […]
Factors Influencing Great Blue Heron Nesting Productivityon the Pacific Coast of Canada from 1998 to 1999
Great Blue Heron (Ardea herodias) Science Article 12 abstract Surveys were conducted at 35 Great Blue Heron (Ardea herodias) colonies in urban and rural landscapes of south-coastal British Columbia, Canada, to investigate low nesting productivity during 1998 and 1999 compared to a decade ago. Nesting failure was common (59% of 1,247 nests) and widespread (in […]
Observations of the Great Black-backed Gull in Bulgaria
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 […]
PREDATION ON NESTLING BARE-THROATED TIGER-HERONS BY A GREAT BLACK-HAWK
Great Black Hawk (Buteogallus urubitinga) Science Article 1 abstract Little is known about the diet or hunting strategies of Great Black-Hawks (Buteogallusurubitinga), a widely distributed but poorly known species in Central and South America.In Panama, Wetmore (Wetmore 1965, p. 231) reported that frogs form a principal food source,and that lizards, particularly basilisks (Basiliscus), also are […]
Booming activity of male Bitterns Botaurus stellaris in relation to reproductive cycle and harem size
Great Bittern (Botaurus stellaris) Science Article 1 abstract The relationship between vocalization rate and nesting parameters in the polygynous Great Bittern Botaurus stellaris was studied in a breeding population of eastern Poland. There was a difference between individuals in mean length of boom train and males with high booming rate had longer boom trains. No […]
An Attempt to Determine the Prey of the Great Auk
Great Auk (Pinguinus impennis) Science Article 3 abstract The flightless Great Auk (?inguinus impennis), the largest of all Recent Alcidae, was exterminated in 1844 (Greenway 1958), and no one who can properly be called a naturalist ever encountered the bird inlife. As a consequence, virtually no details are known of its behavior or ecology. One […]
First Record of the Great Auk (Pinguinus impennis) from Labrador
Great Auk (Pinguinus impennis) Science Article 2 abstract Recent archeological investigations undertaken by Bryan Mawr College and the Smithsonian institution along the Torngat Mountain coastline of northernmost Labrador have produced the first documented evidence of the extinct Great Auk, Pinguinus impennis, from the Labrador Peninsula. RICHARD H. JORDAN AND STORRS L. OLSON, Auk, Vol. 99 […]
A SUBFOSSIL GREAT AUK-PINGUINUS IMPENNIS(L.) FROM THE NETHERLANDS
Great Auk (Pinguinus impennis) Science Article 4 abstract In the spring of 1977 a nearly complete skeleton of a Great Auk was recovered during the excavation of a Roman site at Velsen (prov. North Holland) by the Albert Egges van Giffen Institute for Pre- and Protohistory (I.P.P.) of the University of Amsterdam. The find can […]
Great Auk and Common Murre from a Florida Midden
Great Auk (Pinguinus impennis) Science Article 6 abstract Among bird bones from archeological sites submitted for identification by Ripley P. Bullen of the Florida State Museum are the proximal portion of a right humerus of the Great Ank (Pinguinus impennis) and the proximal portion of a left humerus of the Common Murre (Uria aalFe). The […]