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Progne sinaloae Psarocolius montezuma Psarocolius wagleri Pterodroma cookii Pteroglossus torquatus Ptychoramphus aleuticus Ptychoramphus aleuticus australis Puffinus auricularis Puffinus creatopus Puffinus opisthomelas Puffinus pacificus Pulsatrix perspicillata Quiscalus palustris Rallus elegans Rallus elegans tenuirostris Rallus longirostris grossi Rallus longirostris levipes Rallus longirostris pallidus Rallus longirostris yumanensis Ramphastos sulfuratus Ramphocaenus rufiventris Regulus calendula obscurus Rhynchopsitta pachirhyncha Rhynchopsitta terresi Rhytipterna holerythra Ridgwayia pinicola Rosthramus sociabilis Sarcoramphus papa Sclerurus guatemalensis Sclerurus mexicanus Seiurus aurocapillus Seiurus motacilla Seiurus noveboracensis Sittasomus griseicapillus Spizaetus ornatus Spizaetus tyrannus Spizastur melanoleucus Spizella wortheni Sporophila schistacea Sterna antillarum Sterna elegans Strix fulvescens

R* R A P R A R A* P A A P P* R P R* P* R P A R A* P P* R R* A P R R R R R R P* A P A R P A R

Strix occidentalis Strix varia Sula nebouxii Sula sula Synthliboramphus craveri Synthliboramphus hypoleucus Tangara cabanisi Tangara larvata Taraba major Terenotriccus erythrurus Thalurania ridgwayi Thamnistes anabatinus Thryomanes sissonii Tigrisoma lineatum Todirostrum cinereum Todirostrum sylvia Tolmomyias sulphurescens Toxostoma guttatum Troglodytes tanneri Trogon collaris Trogon massena Trogon violaceus Turdus infuscatus Turdus plebejus Turdus rufitorques Uropsila leucogastra Veniliornis fumigatus Vermivora luciae Vireo atricapillus Vireo bairdi Vireo belli pusilus Vireo brevipennis Vireo nelsoni Vireolanius pulchellus Wilsonia citrina Xenops minutus Xenospiza baileyi Xenotriccus callizonus Xenotriccus mexicanus Xiphorhynchus erythropygius Zenaida graysoni

OTHER PERTINENT INFORMATION ON BIRDS

The Commission for Environmental Cooperation’s list of “Species of Common Conservation Concern in North America” (CEC, in press), includes the following bird species: Ferruginous Hawk (Buteo regalis), Peregrine Falcon (Falco peregrinus), Loggerhead Shrike (Lanius ludovicianus), Piping Plover ( Charadrius melodus), Mountain Plover (Charadrius montanus), Burrowing Owl (Athene cunicularia), Northern Spotted Owl (Strix occidentalis caurina), Mexican

Spotted

Owl

(Strix

occidentalis

lucida),

Golden-cheeked

Warbler

Whooping Crane (Grus americana) and California Condor (Gymnogyps

(Dendroica chrysoparia), californianus).

Geographic variation in species richness of North American breeding land birds was compiled by Cook (1969), dividing the continent into grid squares, tallying the numbers of species whose geographic range overlapped each square and then interpolating and smoothing the data to produce isopleths depicting diversity.

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A A A A A A A R R R A* R P* R R R R A* P* R R R R R R R R A A Pr* P A* A* R A A P* A A R P*

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