What do these ranks mean? ORBIC's ranking definitions

Larch Mountain Salamander

Larch Mountain Salamander

Plethodon larselli

List 2S2?
Siskiyou Mountains Salamander

Siskiyou Mountains Salamander

Plethodon stormi

List 1S2
Cope's Giant Salamander

Cope's Giant Salamander

Dicamptodon copei

List 2S2?
Cascade Torrent Salamander

Cascade Torrent Salamander

Rhyacotriton cascadae

List 2S2S3
Columbia Torrent Salamander

Columbia Torrent Salamander

Rhyacotriton kezeri

List 2S2S3
Yuma Skipper

Yuma Skipper

Ochlodes yuma

List 2S2
Johnson's Hairstreak

Johnson's Hairstreak

Callophrys johnsoni

List 2S2S3
Woodhouse's Toad

Woodhouse's Toad

Anaxyrus woodhousii

List 2S2
Foothill Yellow-Legged Frog

Foothill Yellow-Legged Frog

Rana boylii

List 2S2S3
Winged Floater

Winged Floater

Anodonta nuttalliana

List 3S2?

Horned Grebe

Podiceps auritus

List 2S2B,S5N
Western Ridged Mussel

Western Ridged Mussel

Gonidea angulata

List 1S2S3
Clark's Grebe

Clark's Grebe

Aechmophorus clarkii

List 4S3B,S2N
Fork-Tailed Storm-Petrel

Fork-Tailed Storm-Petrel

Hydrobates furcatus

List 2S2B
California Brown Pelican

California Brown Pelican

Pelecanus occidentalis californicus

List 2S2N
Snowy Egret

Snowy Egret

Egretta thula

List 2S2B

Shortface Lanx

Fisherola nuttalli

List 1S1S2

Tule White-Fronted Goose

Anser albifrons elgasi

List 4S2S3N
Brant

Brant

Branta bernicla

List 4S2N
Bufflehead

Bufflehead

Bucephala albeola

List 2S2B,S5N

Sullivan's Sulphur

Colias occidentalis sullivani

List 1S2
Morrison Bumblebee

Morrison Bumblebee

Bombus morrisoni

List 2S2
Western Monarch

Western Monarch

Danaus plexippus pop. 1

List 1S1S2B
Western Bumblebee

Western Bumblebee

Bombus occidentalis

List 2S2
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