What do these ranks mean? ORBIC's ranking definitions

Clouded Salamander

Clouded Salamander

Aneides ferreus

List 4S3S4
California Slender Salamander

California Slender Salamander

Batrachoseps attenuatus

List 4S3
Oregon Slender Salamander

Oregon Slender Salamander

Batrachoseps wrighti

List 4S3
Del Norte Salamander

Del Norte Salamander

Plethodon elongatus

List 4S3
Southern Torrent Salamander

Southern Torrent Salamander

Rhyacotriton variegatus

List 4S3?
Cascade Torrent Salamander

Cascade Torrent Salamander

Rhyacotriton cascadae

List 2S2S3
Columbia Torrent Salamander

Columbia Torrent Salamander

Rhyacotriton kezeri

List 2S2S3
Coastal Tailed Frog

Coastal Tailed Frog

Ascaphus truei

List 4S3
Johnson's Hairstreak

Johnson's Hairstreak

Callophrys johnsoni

List 2S2S3
Northern Red-Legged Frog

Northern Red-Legged Frog

Rana aurora

List 4S3S4
Foothill Yellow-Legged Frog

Foothill Yellow-Legged Frog

Rana boylii

List 2S2S3
Cascades Frog

Cascades Frog

Rana cascadae

List 4S3
Oregon Floater

Oregon Floater

Anodonta oregonensis

List 2S3?
Western Ridged Mussel

Western Ridged Mussel

Gonidea angulata

List 1S2S3
Clark's Grebe

Clark's Grebe

Aechmophorus clarkii

List 4S3B,S2N
Western Pearlshell

Western Pearlshell

Margaritifera falcata

List 2S3
Pelagic Cormorant

Pelagic Cormorant

Urile pelagicus

List 4S3
White-Faced Ibis

White-Faced Ibis

Plegadis chihi

List 4S3B

Tule White-Fronted Goose

Anser albifrons elgasi

List 4S2S3N
Aleutian Cackling Goose

Aleutian Cackling Goose

Branta hutchinsii leucopareia

List 2S3N
Dusky Canada Goose

Dusky Canada Goose

Branta canadensis occidentalis

List 2S3N
Barrow's Goldeneye

Barrow's Goldeneye

Bucephala islandica

List 4S3B,S3N
White-Tailed Kite

White-Tailed Kite

Elanus leucurus

List 4S3
American Peregrine Falcon

American Peregrine Falcon

Falco peregrinus anatum

List 4S3
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