Roadrunner
Roadside Hawk
Rock Pigeon
Rock Ptarmigan
Rock Sandpiper, Calidris ptilocnemis
Rock Wren
Rose-breasted Grosbeak
Rose-throated Becard
Roseate Spoonbill
Roseate Tern
Rosefinch
Ross's Goose
Ross's Gull
Rough-legged Hawk
Royal Tern
Ruby-crowned Kinglet
Ruby-throated Hummingbird
Ruddy Duck
Ruddy Ground-Dove
Ruddy Quail-Dove
Ruddy Turnstone
Ruff

Ruffed Grouse
Rufous Hummingbird
Rufous-backed Robin
Rufous-capped Warbler
Rufous-crowned Sparrow
Rufous-winged Sparrow
Rustic Bunting
Rusty Blackbird
Sabine's Gull
Sage Sparrow
Sage Thrasher
Saltmarsh Sharp-tailed Sparrow
Sanderling
Sandhill Crane
Sandpiper
Sandwich Tern
Savannah Sparrow
Say's Phoebe
Scaled Quail
Scaly-naped Pigeon
Scarlet Ibis
Scarlet Tanager

Scissor-tailed Flycatcher
Scott's Oriole
Screech-Owl
Seaside Sparrow
Sedge Wren
Semipalmated Plover
Semipalmated Sandpiper
Sharp-shinned Hawk
Sharp-tailed Grouse
Sharp-tailed Sandpiper
Shiny Cowbird
Short-billed Dowitcher
Short-eared Owl
Short-tailed Albatross
Short-tailed Hawk
Short-tailed Shearwater
Shy Albatross
Siberian Accentor
Siberian Blue Robin
Siberian Rubythroat
Sky Lark
Slate-throated Redstart

Slaty-backed Gull
Slender-billed Curlew
Smew
Smith's Longspur
Smooth-billed Ani
Snail Kite
Snipe
Snow Bunting
Snow Goose
Snowy Egret
Snowy Owl
Snowy Plover
Social Flycatcher
Solitary Sandpiper
Song Sparrow
Sooty Shearwater
Sooty Tern
Sora
South Polar Skua
Southern Martin