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Challenges in Birding and How to Approach Them
The Winter Loons
The Western Grebe Complex
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adult Arctic bill shape birders birds blackish Blackpoll Botteri's Botteri's Sparrow breast brown buff call notes Cassin's Cassin's Finch Cassin's Sparrow Chickadee Clay-colored Sparrow color Common Tern conspicuous contrast Cooper's crown dark darker distinctive Dowitcher dusky ear coverts edges Egret Empid Empidonax eye-ring face pattern females field marks Finch first-winter flanks flight Flycatcher fresh plumage Glaucous-winged gray Hammond's head hummingbirds hybrids Iceland Iceland Gulls identification immature jaegers juvenile Long-billed Long-billed Dowitcher look Loon lower mandible males molt nape narrow neck North America pale paler Philadelphia Vireo Pine Warbler plumage Pomarine Reddish Egret Roseate Tern rufous Sandpiper SAPSUCKER scapulars Scaup screech-owls season Sharp-shinned Sharp-tailed slightly song Sparrow species spots streaks stripe summer supercilium tail feathers tends Tern tertials Thayer's Gull throat typical underparts undertail coverts upper upperparts usually variable variation Vireo Western WESTERN SCREECH-OWL whitish wing bars wing pattern wingtips worn yellow Yellow-bellied