Aalscholver (Dutch)
Aasgier (Dutch)
Aaskrähe (German)
Abejaruco común (Spanish)
Abubilla (Spanish)
Accenteur alpin (French)
Accenteur mouchet (Italian)
Acentor alpino (Spanish)
Adlerbussard (German)
Agachadiza chica (Spanish)
Agachadiza común (Spanish)
Agachadiza real (Spanish)
Agateador común (Spanish)
Agateador norteño (Spanish)
Agrobate roux (Spanish)
Aguila calzada (Spanish)
Aguila culebrera (Spanish)
Aguila imperial (Spanish)
Aguila imperial iberica (Spanish)
Aguila moteada (Spanish)
Aguila nipalense (Spanish)
Aguila perdicera (Spanish)
Aguila pescadora (Spanish)
Aguila pomerana (Spanish)
Aguila real (Spanish)
Aguilucho cenizo (Spanish)
Aguilucho lagunero (Spanish)
Aguilucho pálido (Spanish)
Aguilucho papialbo (Spanish)
Aguja colinegra (Spanish)
Aguja colipinta (Spanish)
Aigle botté (French)
Aigle criard (French)
Aigle de Bonelli (French)
Aigle des steppes (French)
Aigle impérial (French)
Aigle impérial ibérique (French)
Aigle pomarin (French)
Aigle royal (French)
Aigrette garzette (French)
Airone bianco maggiore (Italian)
Airone guardabuoi (Italian)
Airone rosso (Italian)
Albanella minore (Italian)
Albanella pallida (Italian)
Albanella reale (Italian)
Albastrello (Italian)
Alca común (Spanish)
Alcaraván (Spanish)
Alcatraz (Spanish)
Alcaudón chico (Spanish)
Alcaudón común (Spanish)
Alcaudón dorsirrojo (Spanish)
Alcaudón enmascarado (Spanish)
Alcaudón meridional (Spanish)
Alcaudón real (Spanish)
Alcotán (Spanish)
Alimoche común (Spanish)
Alk (Dutch)
Allocco (Italian)
Allocco degli Urali (Italian)
Allocco di Lapponia (Italian)
Allodola (Italian)
Allodola del Dupont (Italian)
Alondra común (Spanish)
Alondra cornuda (Italian)
Alondra de Dupont (Spanish)
Alouette calandra (French)
Alouette calandrelle (French)
Alouette des champs (French)
Alouette hausse-col (Spanish)
Alouette leucoptère (French)
Alouette lulu (French)
Alouette nègre (French)
Alouette pispolette (French)
Alpenbraunelle (German)
Alpendohle (German)
Alpengierzwaluw (Dutch)
Alpenheggemus (Dutch)
Alpenkauw (Dutch)
Alpenkraai (Dutch)
Alpenkrähe (German)
Alpenschneehuhn (German)
Alpensegler (German)
Alpensneeuwhoen (Dutch)
Alpenstrandläufer (German)
Alpine Accentor (English)
Alpine Chough (English)
Alpine Swift (English)
Alzarola (Italian)
Alzavola (Italian)
Ampelis europeo (Spanish)
Amsel (German)
Anade friso (Spanish)
Anade rabudo (Spanish)
Anade real (Spanish)
Anade silbon (Spanish)
Anatra marmorizzata (Italian)
Andalusian Hemipode (German)
Andarríos bastardo (Spanish)
Andarríos chico (Spanish)
Andarríos de Terek (Spanish)
Andarríos grande (Spanish)
Ansar campestre (Spanish)
Ansar careto chico (Spanish)
Ansar careto grande (Spanish)
Ansar común (Spanish)
Ansar piquicorto (Spanish)
Appelvink (Dutch)
Aquatic Warbler (English)
Aquila anatraia maggiore (Italian)
Aquila anatraia minore (Italian)
Aquila del Bonelli (Italian)
Aquila delle steppe (Italian)
Aquila di mare (Italian)
Aquila imperiale (Italian)
Aquila imperiale occidentale (Italian)
Aquila minore (Italian)
Aquila reale (Italian)
Arao aliblanco (Spanish)
Arao común (Italian)
Arao de Brünnich (Spanish)
Archibebe claro (Spanish)
Archibebe común (Spanish)
Archibebe fino (Spanish)
Archibebe oscuro (Spanish)
Arctic Redpoll (English)
Arctic Skua (English)
Arctic Tern (English)
Arctic Warbler (English)
Arendbuizerd (Dutch)
Arrendajo (Spanish)
Arrendajo funesto (Spanish)
Assiolo (Italian)
Astore (Italian)
Astrild ondulé (French)
Astrilda común (Spanish)
Astrilda comune (Italian)
Atlantic Puffin (English)
Audouin's Gull (English)
Audouins Meeuw (Dutch)
Auerhoen (Dutch)
Auerhuhn (German)
Austernfischer (German)
Autillo (Spanish)
Autour des palombes (French)
Avefría (Spanish)
Avefría espolonoda (Italian)
Averla capirossa (Italian)
Averla cenerina (Italian)
Averla maggiore (Italian)
Averla mascherata (Italian)
Averla meridionale (Italian)
Averla piccola (Italian)
Avetorillo común (Spanish)
Avetoro común (Spanish)
Avíon común (Spanish)
Avíon roquero (Spanish)
Avíon zapador (Italian)
Avocet (English)
Avoceta (Spanish)
Avocetta (Italian)
Avocette (French)
Avutarda (Spanish)
Avvoltoio monaco (Italian)
Aziatische Steenpatrijs (Dutch)
Azor (Spanish)
Azure Tit (English)
Azure-winged Magpie (English)
Azuurmees (Dutch)