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 […]
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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)
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 […]
Eustrongylides and Pesticide Levels in a Great Blue Heron Shot in Wisconsin
Great Blue Heron (Ardea herodias) Science Article 11 abstract The parasitic roundworm, Eustrongylides ignotus [agersk , has been known to cause mortalit y and morbidity in members of the heron family in the eastern states of North America. To date no previous records exist for this nematode in Wisconsin. D . M . Swinefordi, Patuxent […]
Evidence from nature: interspecies spread of heronhepatitis B viruses
Great Blue Heron (Ardea herodias) Science Article 8 abstract Heron hepatitis B viruses (HHBVs) in three subspecies of free-living great blue herons(Ardea herodias) from Florida, USA, were identified and characterized. Eight of 13 sampleswere positive in all assays used, whereas sera from egrets, which are also members of the familyArdeidae, were negative in the same […]
Retrobulbar teratoma in a great blue heron (Ardea herodias)
Great Blue Heron (Ardea herodias) Science Article 2 abstract At presentation to the Vermont Institute of Natural Science,an adult female great blue heron (Ardea herodias) hadunilateral exophthalmos. The bird was subsequently euthanatizedand submitted to the Tufts University School of VeterinaryMedicine Wildlife Clinic. Scott H. Schelling, J Vet Diagn Invest 6:514-516 (1994) Download article download full […]