What do these ranks mean? ORBIC's ranking definitions

Clouded Salamander

Clouded Salamander

Aneides ferreus

List 4S3S4
Northern Red-Legged Frog

Northern Red-Legged Frog

Rana aurora

List 4S3S4

Red-Necked Grebe

Podiceps grisegena

List 2S1B,S4N
Bald Eagle

Bald Eagle

Haliaeetus leucocephalus

List 4S4B,S4N
Mountain Quail

Mountain Quail

Oreortyx pictus

List 4S3S4
Long-Eared Owl

Long-Eared Owl

Asio otus

List 3S3S4
Rufous Hummingbird

Rufous Hummingbird

Selasphorus rufus

List 4S3S4

Pileated Woodpecker

Dryocopus pileatus

List 4S4
Golden-Crowned Kinglet

Golden-Crowned Kinglet

Regulus satrapa

List 4S3S4

Sage Thrasher

Oreoscoptes montanus

List 4S3S4B
Western Toad

Western Toad

Anaxyrus boreas

List 4S3S4

Yellow-Breasted Chat

Icteria virens

List 4S4B
Western Grebe

Western Grebe

Aechmophorus occidentalis

List 4S4B,S2S3N
Golden Eagle

Golden Eagle

Aquila chrysaetos

List 4S3S4

Chinook Salmon (Southern Oregon/Northern California Coast ESU, Spring Run)

Oncorhynchus tshawytscha pop. 25

List 3S4
Greater Sandhill Crane

Greater Sandhill Crane

Antigone canadensis tabida

List 4S3S4B
Caspian Tern

Caspian Tern

Hydroprogne caspia

List 4S4?
Black-Backed Woodpecker

Black-Backed Woodpecker

Picoides arcticus

List 4S4?

Western Bluebird

Sialia mexicana

List 4S4B,S4N
Brazilian Free-Tailed Bat

Brazilian Free-Tailed Bat

Tadarida brasiliensis

List 4S4

Chipping Sparrow

Spizella passerina

List 4S4B
White-Tailed Antelope Squirrel

White-Tailed Antelope Squirrel

Ammospermophilus leucurus

List 3S4
Western Gray Squirrel

Western Gray Squirrel

Sciurus griseus

List 4S4
Camas Pocket Gopher

Camas Pocket Gopher

Thomomys bulbivorus

List 4S3S4
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