Maguari Stork (Ciconia maguari) Science Article 1 abstract Although it has a wide range in tropical South America, the Maguari Stork (Ciconia maguari) is poorly known. In an 11-yr study of its breeding biology in the llanos ofVenezuela I found the mean clutch size for 3 yr to be 3.2 eggs. The young hatched synchronously […]
Category: Ciconiiformes
Notes on the occurrence of Little Egret (Egretta garzetta) in the Americas, with reference to other Palearctic vagrants
Little Egret (Egretta garzetta) Science Article 2 abstract The Old World species Egretta garzetta has been observed about 45 times in the Americas at widely separated locations. Numbers of sightings in the Americas are increasing annually. Individuals apparently migrate with Snowy Egrets, Egretta thula, between the Caribbean and northeastern North America. William L. Murphy, Colonial […]
Notes on the occurrence of Little Egret (Egretta garzetta) in the Americas, with reference to other Palearctic vagrants
Little Egret (Egretta garzetta) Science Article 2 abstract The Old World species Egretta garzetta has been observed about 45 times in the Americas at widely separated locations. Numbers of sightings in the Americas are increasing annually. Individuals apparently migrate with Snowy Egrets, Egretta thula, between the Caribbean and northeastern North America. William L. Murphy, Colonial […]
Mate and nestling desertion in colonial little egrets
Little Egret (Egretta garzetta) Science Article 1 abstract I observed 25 Little Egret (Egretta garzetta) nests during the nestling period. Eleven (44%) were deserted by the female parent, one (4%) by the male, and three (12%) by both parents. Deserters of both sexes left nests soon after single parent care became feasible ([x bar] = […]
Mate and nestling desertion in colonial little egrets
Little Egret (Egretta garzetta) Science Article 1 abstract I observed 25 Little Egret (Egretta garzetta) nests during the nestling period. Eleven (44%) were deserted by the female parent, one (4%) by the male, and three (12%) by both parents. Deserters of both sexes left nests soon after single parent care became feasible ([x bar] = […]
Evidence of prenuptial moult in the Little Bittern Ixobrychus minutus
Little Bittern (Ixobrychus minutus) Science Article 1 abstract Evidence for a partial prenuptial moult in the Little Bittern Ixobrychus minutus is reported for the first time, and is based on both live and museum specimens. The prenuptial moult, which is probably undertaken in the African winter quarters shortly before the spring migration, involves body feathers […]
Evidence of prenuptial moult in the Little Bittern Ixobrychus minutus
Little Bittern (Ixobrychus minutus) Science Article 1 abstract Evidence for a partial prenuptial moult in the Little Bittern Ixobrychus minutus is reported for the first time, and is based on both live and museum specimens. The prenuptial moult, which is probably undertaken in the African winter quarters shortly before the spring migration, involves body feathers […]
The Breeding Ecology of Least Bitterns (Ixobrychus exilis) at Agassiz and Mingo
Least Bittern (Ixobrychus exilis) Science Article 3 abstract Habitat selection and reproductive effort of least bitterns (Ixobrychus exilis) weremonitored in 2001 and 2002 at Mingo National Wildlife Refuge (Mingo) in southeastMissouri and 2001 through 2004 at Agassiz National Wildlife Refuge (Agassiz) innorthwest Minnesota. The main objective was to study variation in the breeding ecologyof least […]
Least Bittern nesting colonially
Least Bittern (Ixobrychus exilis) Science Article 6 abstract Unlike most herons, bitterns are considered to be noncolonial nesters. Literature records of the nesting dispersion of the Least Bittern (lxobrychus exilis) support this view. Beecher (1942) reported densities ranging from 1 nest in 39.87 acres (0.06 nests per ha) to 4 nests in 1.38 acres (1.7 […]
Population Viability AssessmentForLeast Bittern (Ixobrychus Exilis)
Least Bittern (Ixobrychus exilis) Science Article 1 abstract In Illinois, this species is an uncommon migrant and summer resident. Recent recordsinclude the following counties: Carroll, Cass, Coles, Cook, Crawford, DuPage, Fulton,Grundy, Henry, Kane, Kendall, Lake, Lawrence, Lee, Marshall, Mason, Massac,McHenry, Putnam, Rock Island, Sangamon, Tazewell, Vermilion, Will, Williamson,Winnebago. Christopher J. Whelan, Center for Biodiversity. Un. […]