Ebro Delta, Spain with 33 records
Llobregat Delta, Spain with 22 records
Barcelona Zoo, Spain with 15 records
San Francisco, USA (United States) with 6 records
Esteros del Iberá, Argentina with 6 records
Jujuy Province, Argentina with 5 records
Barcelona Province, Spain with 4 records
Hornoya Island, Norway with 4 records
Bear River Migratory Bird Refuge, USA (United States) with 4 records
Tortuguero, Costa Rica with 4 records
Lleida, Spain with 4 records
Costanera Sur Ecological Reserve, Argentina with 3 records
Artesa de Lleida, Spain with 3 records
Drake, Costa Rica with 3 records
Monteverde Cloud Forest Preserve, Costa Rica with 3 records
Helsinki, Finland with 3 records
Iguazú Falls, Argentina with 3 records
Kings Canyon National Park, USA (United States) with 2 records
Península Valdés, Argentina with 2 records
Barcelona City, Spain with 2 records

This is a list of the top 20 specific localities, sorted by the total amount of materials.