What do these ranks mean? ORBIC's ranking definitions

Oregon Slender Salamander

Oregon Slender Salamander

Batrachoseps wrighti

List 4S3

Crater Lake Newt

Taricha granulosa mazamae

List 1S1
Cope's Giant Salamander

Cope's Giant Salamander

Dicamptodon copei

List 2S2?
Coastal Tailed Frog

Coastal Tailed Frog

Ascaphus truei

List 4S3
Yuma Skipper

Yuma Skipper

Ochlodes yuma

List 2S2
Johnson's Hairstreak

Johnson's Hairstreak

Callophrys johnsoni

List 2S2S3
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?

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
Clark's Grebe

Clark's Grebe

Aechmophorus clarkii

List 4S3B,S2N
Western Pearlshell

Western Pearlshell

Margaritifera falcata

List 2S3
Least Bittern

Least Bittern

Botaurus exilis

List 3S1B
Snowy Egret

Snowy Egret

Egretta thula

List 2S2B
White-Faced Ibis

White-Faced Ibis

Plegadis chihi

List 4S3B

Tule White-Fronted Goose

Anser albifrons elgasi

List 4S2S3N
Barrow's Goldeneye

Barrow's Goldeneye

Bucephala islandica

List 4S3B,S3N
Bufflehead

Bufflehead

Bucephala albeola

List 2S2B,S5N
White-Tailed Kite

White-Tailed Kite

Elanus leucurus

List 4S3
Bald Eagle

Bald Eagle

Haliaeetus leucocephalus

List 4S4B,S4N
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