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
Del Norte Salamander

Del Norte Salamander

Plethodon elongatus

List 4S3
Siskiyou Mountains Salamander

Siskiyou Mountains Salamander

Plethodon stormi

List 1S2
Southern Torrent Salamander

Southern Torrent Salamander

Rhyacotriton variegatus

List 4S3?
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
Northern Leopard Frog

Northern Leopard Frog

Lithobates pipiens

List 2S1
Winged Floater

Winged Floater

Anodonta nuttalliana

List 3S2?
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
Least Bittern

Least Bittern

Botaurus exilis

List 3S1B
Brant

Brant

Branta bernicla

List 4S2N
Aleutian Cackling Goose

Aleutian Cackling Goose

Branta hutchinsii leucopareia

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
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