Aves |
Ciconiiformes |
Ardeidae
Umwelt: Milieu / Klimazone / Tiefenbereich / Verbreitungsgebiet
Ökologie
Others; süßwasser; brackwasser. Boreal
Northeast Pacific: Canada.
Länge bei der ersten Reifung / Größe / Gewicht / Alter
Geschlechtsreife: Lm ? range ? - ? cm Max length : 130 cm TL Männchen/unbestimmt; (Ref. 94965)
Eagle-sized wingspan; grey-blue plumage; long, dagger-like yellow-bill; red thighs (Ref. 94965).
Dependent on healthy, uncontaminated coastal wetlands and estuaries for feeding. Wades in shallow water whilst foraging. Forms colonies. Piscivorous. In Florida Bay, natural feeding supplemented by "panhandling" association with humans where they feed on bait fish from locals and developed begging behavior from residents. In Stanley Park Zoo in Vancouver, British Columbia, a large colony is able to persist in close proximity to human activities for over 78 years. In Florida Bay, population decline of 30-40% due to hurricanes were linked to nesting and foraging habitat degradation (Ref. 87784).
Lebenszyklus und Paarungsverhalten
Geschlechtsreife | Fortpflanzung | Ablaichen | Eier | Fruchtbarkeit | Larven
Colonies in the Strait of Georgia have high rates of reproductive success (Ref. 95040).
Elliott, J.E., R.W. Butler, R.J. Norstrom and P.E. Whitehead 1989 Environmental contaminants and reproductive success of great blue herons Ardea herodias in British Columbia 1986-87. Environmental Pollution 59:91-114. (Ref. 95040)
IUCN Rote Liste Status
(Ref. 130435: Version 2025-2 (Global))
CITES Status (Ref. 108899)
Not Evaluated
Not Evaluated
Bedrohung für Menschen
Harmless
Nutzung durch Menschen
FAO - Publication: search | FishSource |
Tools
Mehr Information
PopulationsdynamikWachstumMax. Alter/GrößenLänge-Gewicht-Rel.Länge-Länge-Verhältnis.LängenhäufigkeitenMassenkonvertierungDichte PhysiologieSauerstoffverbrauch
MenschenbezogenBriefmarken, Münzen, Verschiedenes.
Internet Quellen
Schätzungen auf der Grundlage von Modellen
Anfälligkeit der Fischerei
(Ref. 71543) |
Very high vulnerability (78 of 100). |
