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 […]

Cattle Egret (Bubulcus ibis) Science Article 4 abstract Naturally occurring secondary nutritional hyperparathyroidism is described in the nestlings of two colonies of cattle egrets (Bubulcus ibis) from Central Texas (Bryan and San Antonio, Texas, USA). Nestlings from a third colony (Waco, Texas, USA) were collected in a subsequent year for comparison. Birds from the first […]

Capped Heron (Pilherodius pileatus) Science Article 1 abstract Behavior, habitat use, and foraging of the Whistling Heron (Syrigma sibilatrix)a nd Capped Heron (Pilherodiusp ileatus)w ere studied in Venezuela and Argentina. Both foraged primarily alone or in pairs, but Whistling Herons also fed and roosted socially. Whistling Herons nested solitarily, maintained post-fledging associations with young, and […]

American Bittern (Botaurus lentiginosus) Science Article 2 abstract An effective and efficient bird monitoring program is challenging to develop, given the different level of intensity of monitoring and the statistical vigor that monitoring programs must meet to effectively address specific objectives. I evaluated the marsh bird monitoring program established at Agassiz National Wildlife Refuge (AGNWR) […]

American Bittern (Botaurus lentiginosus) Science Article 1 abstract Biometrics, plumage and bare-part colour of 87 Great BitternsBotaurus stellarisfrom the UK,France, Italy, Poland and Belarus, of known sex (sexed by behaviour, DNA or dissection),were analysed to provide reliable sexing and ageing criteria for this little-known species,and to investigate geographical variation in biometrics. Four parameters were analysed: […]

American Bittern (Botaurus lentiginosus) Science Article 4 abstract Nests of American bitterns lentiginosus) marsh hawks (Circus cyaneus), and short-eared owls (Asio u ually found in wetland habitats. Although large marshes containing dense stands of bulrushes (Scirpus), (Typha) , or other wetland vegetation are favored nesting cover , these birds have also been reported to nest […]

American Bittern (Botaurus lentiginosus) Science Article 3 abstract There appears to be almost no detailed information on the behavior associated with copulation in the American Bittern (Botaurus lentiginosus); Palmer (Ed., 1962, Handbook of North American birds, vol. 1, New Haven, Yale Univ. Press) has summarized the fragmentary notes on this species. The comparable behavior of […]

Agami Heron (Agamia agami) Science Article 2 abstract During a survey of the breeding birds of Costa Rica conducted by the Western Foundation of Vertebrate, I found a nesting colony of the Chestnut-bellied Heron (Agamia agami) at Westfalia, 7 km SE of Puerto Limon, Prov. Limon, on 19 August 1985. This is the first breeding […]

Agami Heron (Agamia agami) Science Article 1 abstract Although some information on the breeding of the Chestnut-bellied Heron (Agamia agami) in other countries has been published (Michener et al. 1964, Haverschmidt 1968, J. Hancock and H. Elliot 1978), no previous breeding records have been reported for Venezuela. On 26 July 1980, we located three nests […]

[order] CICONIIFORMES | [family] Ardeidae | [latin] Zebrilus undulatus | [authority] Gmelin, 1789 | [UK] Zigzag Heron | [FR] Onore zigzag | [DE] Zickzackreiher | [ES] Avetigre Enana | [NL] Zigzagreiger Subspecies Monotypic species Genus Zebrilus is a monotypic genus in the family Ardeidae. It consists of one species the Zigzag Heron. Even though the […]