| canada | alberta | aythya marila | species | 2 | 0 |
| canada | british columbia | aythya marila | species | 0 | 1 |
| canada | new brunswick | aythya marila | species | 1 | 1 |
| canada | newfoundland and labrador | aythya marila | species | 1 | 0 |
| canada | northwest territories | aythya marila | species | 0 | 1 |
| canada | nova scotia | aythya marila | species | 3 | 0 |
| canada | ontario | aythya marila | species | 1 | 1 |
| canada | quebec | aythya marila | species | 1 | 1 |
| canada | yukon | aythya marila | species | 0 | 1 |
| germany | | aythya marila | species | 2 | 0 |
| japan | aichi prefecture | aythya marila | species | 8 | 0 |
| japan | yamaguchi prefecture | aythya marila | species | 1 | 0 |
| norway | sor-trondelag county | aythya marila | species | 1 | 0 |
| poland | podlasie province | aythya marila | species | 0 | 1 |
| poland | west pomerania province | aythya marila | species | 0 | 2 |
| russia | chukotka autonomous okrug | aythya marila | species | 2 | 0 |
| russia | kaliningrad oblast | aythya marila | species | 7 | 0 |
| russia | kamchatka krai | aythya marila | species | 6 | 0 |
| russia | sakha republic | aythya marila | species | 1 | 0 |
| russia | yamalo-nenets autonomous okrug | aythya marila | species | 4 | 0 |
| sweden | | aythya marila | species | 1 | 0 |
| sweden | blekinge | aythya marila | species | 1 | 0 |
| united states | | aythya marila | species | 1 | 0 |
| united states | alaska | aythya marila | species | 50 | 0 |
| united states | california | aythya marila | species | 0 | 1 |
| united states | connecticut | aythya marila | species | 0 | 1 |
| united states | new jersey | aythya marila | species | 0 | 1 |
| united states | new york | aythya marila | species | 0 | 1 |