What do these ranks mean? ORBIC's ranking definitions

Clouded Salamander

Clouded Salamander

Aneides ferreus

List 4S3S4
Oregon Slender Salamander

Oregon Slender Salamander

Batrachoseps wrighti

List 4S3
Southern Torrent Salamander

Southern Torrent Salamander

Rhyacotriton variegatus

List 4S3?
Cascade Torrent Salamander

Cascade Torrent Salamander

Rhyacotriton cascadae

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
Winged Floater

Winged Floater

Anodonta nuttalliana

List 3S2?
Oregon Floater

Oregon Floater

Anodonta oregonensis

List 2S3?

Horned Grebe

Podiceps auritus

List 2S2B,S5N

Red-Necked Grebe

Podiceps grisegena

List 2S1B,S4N
Western Ridged Mussel

Western Ridged Mussel

Gonidea angulata

List 1S2S3
Western Pearlshell

Western Pearlshell

Margaritifera falcata

List 2S3

Shortface Lanx

Fisherola nuttalli

List 1S1S2
Brant

Brant

Branta bernicla

List 4S2N
Aleutian Cackling Goose

Aleutian Cackling Goose

Branta hutchinsii leucopareia

List 2S3N
Dusky Canada Goose

Dusky Canada Goose

Branta canadensis occidentalis

List 2S3N
Bufflehead

Bufflehead

Bucephala albeola

List 2S2B,S5N
California Condor

California Condor

Gymnogyps californianus

List 1-exSX
White-Tailed Kite

White-Tailed Kite

Elanus leucurus

List 4S3
Bald Eagle

Bald Eagle

Haliaeetus leucocephalus

List 4S4B,S4N
Suckley's Cuckoo Bumblebee

Suckley's Cuckoo Bumblebee

Bombus suckleyi

List 2S1?
American Peregrine Falcon

American Peregrine Falcon

Falco peregrinus anatum

List 4S3
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