Italia
Lipu Modena http://www.lipumodena.it
ASOER - Associazione Ornitologi dell'Emilia-Romagna http://www.asoer.org/
CISO - Centro Italiano Studi Ornitologici http://ciso-coi.it
S.O.M. / CISNiAr - Centro Italiano Studi Nidi Artificiali http://www.cisniar.it/
Birdwatching ed escursioni guidate in Italia http://www.birdingitaly.net/
Modena birdwatching http://www.modenabw.it
EBN - Euro Bird Net Italia http://www.ebnitalia.it/index.htm
Estero
SEO - Sociedad Española de Ornitología http://www.seo.org/
WFO - Western Field Ornithologists http://www.westernfieldornithologists.org/
The American Ornithologists' Union http://www.aou.org/