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Chouette tachetée

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Chouette tachetée

Nom scientifique: Strix occidentalis

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Avibase

Dendroica

Seuils:

GlobalInformations150
Regional/ContinentalInformations110
Regional SARInformations30
Sub-regional/National SARInformations1

Global

1% of the global abundance. This threshold is used to identify tigger species and IBA's under A4i/ii and A4iv categories

Regional/Continental

1% of the regional/continental population Estimate

Regional SAR

Solely IUCN Vulnerable listed species are presently eligible. The Regional threshold for these birds is static and standardized: Passeriformes (e.g. perching/songbirds) = 90 individuals (or 30 pairs); non-Passeriformes = 30 individuals (or 10 pairs).

Sub-regional/National SAR

The sub-regional/national SAR population threshold = 1% of the COSEWIC population estimate within the region (provinces/territories) the species is listed as being at risk. This threshold is used to identify trigger species and IBAs under criterion C1.

Greater Vancouver Watershed (BC038)
Nombre Année Saison
51995Été
51995Hiver
11992Printemps
1 - 21991Été
11991Printemps
Sumallo River/Skagit Valley (BC035)
Nombre Année Saison
12001Printemps
41995Été
41995Hiver
English Bay & Burrard Inlet (BC020)
Nombre Année Saison
12003Automne