Tag: all of Ardea

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 […]

Behaviours influencing the distribution of great blue herons (ardea herodias fannini) in the strait of Georgia, British Columbia

Great Blue Heron (Ardea herodias) Science Article 14 abstract The Great Blue Heron (Ardea herodias fannini), a nonmigratory subspecies endemic to the Pacific Northwest of North America, is COSEWIC-listed in Canada as a species of ‘special concern’. The Breeding Bird Survey (BBS), conducted since 1969, indicate an ongoing decline in numbers. Recent findings show that […]

Fish profitability for breeding Purple Herons

Purple Heron (Ardea purpurea) Science Article 1 abstract […]. During the breeding season, the Purple Heron Ardea purpurea is a central place forager and periodically visits the nest with the food necessary for nestling development. The tradeoffs between the costs (mostly energy used in travelling and foraging) and benefits (food) of foraging, should allow the […]

Fluctuation in population size and colony dynamics in the Purple Heron Ardea purpurea in Mediterranean France

Purple Heron (Ardea purpurea) Science Article 2 abstract The breeding population of Purple Heron Ardea purpurea in Mediterranean France showed a general decline since 1982 with a further reduction in number of breeding pairs in the early 1990s that has been reversed since 1995. In addition to this general decline, the population showed large annual […]

Extra-pair copulations of Grey Herons nesting at high densities

Grey Heron (Ardea cinerea) Science Article 2 abstract The copulatory behaviour of Grey Heron Ardea cinerea was observed in a colony in Donana (SW Spain) during two years. A total of 262 pair copulation attempts (PCAs) and 39 extra-pair copulation attempts (EPCAs) (12.9% of all copulation attempts) were observed among 31 focal pairs. 84% of […]

Factors affecting the breeding success of the grey heron ( Ardea cinerea)in northern Poland

Grey Heron (Ardea cinerea) Science Article 1 abstract The aim of this study was to estimate the importance of factors a.ecting the breeding success of the grey heron (Ardea cinerea) in three colonies in the northern Poland (Mosty and Ryback), differentiated in population size, habitat type and feeding areas used by birds. The highest mean […]


Great Blue Heron (Ardea herodias) Science Article 7 abstract A comparison of the accuracy of different techniques for counting Great Blue Heron (Ardea herodias) nests suggests that aerial-visual estimates and aerial photographic counts provide reliable measures of colony size while minimizing disturbance to nesting herons. Additionally, post-nesting season ground counts of nests provide a suitable, […]

Utilizing the great blue heron (Ardea herodias)in ecological risk assessments of bioaccumulativecontaminants

Great Blue Heron (Ardea herodias) Science Article 5 abstract Selection of an appropriate species isa key element of effective ecological risk assessments(ERA), especially when site-specific fieldstudies are to be employed. Great blue herons(GBH) possess several ideal characteristics of areceptor species for the assessment of bioaccumulativecompounds in the environment. Rita Marie Seston, Matthew John Zwiernik ET […]


Great Blue Heron (Ardea herodias) Science Article 9 abstract Encounters between predator and prey commonly leadto the death of the prey species; accidental deaths ofthe predator are believed to be relatively rare. Here wereport two cases of Great Blue Heron (Ardea herodias)mortality involving the Pacific lamprey (Entosphenustridentata) in Alviso, California. BLAIR 0. WOLF and STEPHANIE […]