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 […]

[order] CICONIIFORMES | [family] Ardeidae | [latin] Nyctanassa violacea | [authority] Linnaeus, 1758 | [UK] Yellow-crowned Night Heron | [FR] Bihoreau violace | [DE] Krabbenreiher | [ES] Martinete Coronado | [NL] Geelkruinkwak Subspecies Monotypic species Genus Ixobrychus is a genus of bitterns, a group of wading bird in the heron family Ardeidae. It has a […]