Tag: 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 […]

‘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 […]

REPRODUCTIVE SUCCESS OF GREAT BLUE HERONS(ARDIA HERODIAS) NESTING IN SWANSON CREEK, MARYLANDDURING THE CHALK POINT OIL SPILL

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 […]

DIRECTIONS AND TIMING OF GREAT BLUE HERON FORAGING FLIGHTS FROM A CALIFORNIA COLONY:IMPLICATIONS FOR SOCIAL FACILITATION OF FOOD FINDING

Great Blue Heron (Ardea herodias) Science Article 4 abstract Patterns of foraging trips of several species of colonially nesting birdshave been examined recently for evidence that colonies serve as ‘informationcentres’ to assist the members in finding food (Krebs 1974, Hooglandand Sherman 1976, Snapp 1976, Custer and Osborn 1978, Erwin1978). According to this hypothesis colonial nesting […]