(hermanos Salas)
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| Nombre español | Nombre científico | Orden | Familia | English name |
|---|---|---|---|---|
| B | ||||
| Barnacla canadiense | Branta canadensis | Anseriformes | Anatidae | Canada Goose |
| Barnacla cariblanca | Branta leucopsis | Anseriformes | Anatidae | Barnacle Goose |
| Barnacla carinegra | Branta bernicla | Anseriformes | Anatidae | Brent Goose |
| Barnacla cuellirroja | Branta ruficollis | Anseriformes | Anatidae | Red-breasted Goose |
| Becada | Scolopax rusticola | Charadriiformes | Scolopacidae | Woodcock |
| Becada común | Scolopax rusticola | Charadriiformes | Scolopacidae | Woodcock |
| Bigotudo | Panurus biarmicus | Passeriformes | Paradoxornithidae | Bearded Tit |
| Bisbita arbóreo | Anthus trivialis | Passeriformes | Motacillidae | Tree Pipit |
| Bisbita campestre | Anthus campestris | Passeriformes | Motacillidae | Tawny Pipit |
| Bisbita común | Anthus pratensis | Passeriformes | Motacillidae | Meadow Pipit |
| Bisbita de Richard | Anthus richardi | Passeriformes | Motacillidae | Richard's Pipit |
| Bisbita gorgirrojo | Anthus cervinus | Passeriformes | Motacillidae | Red-throated Pipit |
| Bisbita ribereño alpino | Anthus spinoletta | Passeriformes | Motacillidae | Water Pipit |
| Bisbita ribereño costero | Anthus petrosus | Passeriformes | Motacillidae | Rock Pipit |
| Búho campestre | Asio flammeus | Strigiformes | Strigidae | Short-eared Owl |
| Búho chico | Asio otus | Strigiformes | Strigidae | Long-eared Owl |
| Búho real | Bubo bubo | Strigiformes | Strigidae | Eagle Owl |
| Buitre común | Gyps fulvus | Falconiformes | Accipitridae | Griffon Vulture |
| Buitre leonado | Gyps fulvus | Falconiformes | Accipitridae | Griffon Vulture |
| Buitre moteado | Gyps rueppellii | Falconiformes | Accipitridae | Rüppell's Vulture |
| Buitre negro | Aegypius monachus | Falconiformes | Accipitridae | Black Vulture |
| Buitrón | Cisticola juncidis | Passeriformes | Muscicapidae | Fan-tailed Warbler |
| Busardo calzado | Buteo lagopus | Falconiformes | Accipitridae | Rough-legged Buzzard |
| Busardo moro | Buteo rufinus | Falconiformes | Accipitridae | Long-legged Buzzard |
| Busardo ratonero | Buteo buteo | Falconiformes | Accipitridae | Buzzard |
| Buscarla pintoja | Locustella naevia | Passeriformes | Muscicapidae | Grasshopper Warbler |
| Buscarla unicolor | Locustella luscinioides | Passeriformes | Muscicapidae | Savi's Warbler |
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