Robert Straub:
Quiz-1-2011-06-01
Robert Straub:
Quiz-1-zumbador mexicano-Atthis heloisa-Bumblebee Hummingbird-2
Robert Straub:
Quiz-1-zumbador mexicano-Atthis heloisa-Bumblebee Hummingbird
Robert Straub:
Quiz-2-2011-06-01
Robert Straub:
Quiz-2-vireo anteojillo-Vireo solitarius-Blue-headed Vireo
Robert Straub:
Quiz-3-2011-06-01
Robert Straub:
Quiz-3-carpintero cheje-Melanerpes aurifrons-Golden-fronted Woodpecker
Robert Straub:
Quiz-3-carpintero cheje-Melanerpes aurifrons-Golden-fronted Woodpecker -2
Robert Straub:
Quiz-4-2011-06-01
Robert Straub:
Quiz-4-papamoscas atigrado-Myiodynastes luteiventris-Sulphur-bellied Flycatcher
Robert Straub:
Quiz-5-2011-06-01
Robert Straub:
Quiz-5-gavilán zancón-Geranospiza caerulescens-Crane Hawk-2
Robert Straub:
Quiz-5-gavilán zancón-Geranospiza caerulescens-Crane Hawk
Robert Straub:
Quiz-6-2011-06-01
Robert Straub:
Quiz-6-vencejo cuello blanco-Streptoprocne zonaris-White-collared Swift
Robert Straub:
Quiz-7-2011-06-01
Robert Straub:
Quiz-7-chara verde-Cyanocorax yncas-Green Jay
Robert Straub:
Quiz-8-2011-06-01
Robert Straub:
Quiz-8-charrán real-Thalasseus maxima-Royal Tern
Robert Straub:
Quiz-9-2011-06-01
Robert Straub:
Quiz-9-halcón fajado-Aplomado Falcon - Falco femoralis
Robert Straub:
Quiz-9-halcón fajado-Falco femoralis-Aplomado Falcon-2
Robert Straub:
Quiz-10-2011-06-01
Robert Straub:
Quiz-10-picogordo pecho rosa-Pheucticus ludovicianus-Rose-breasted Grosbeak
Robert Straub:
The Crossley ID Guide
Robert Straub:
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