| afghanistan | | oxyura leucocephala | species | 1 | 0 |
| algeria | | oxyura leucocephala | species | 16 | 0 |
| argentina | | oxyura ferruginea | species | 1 | 0 |
| argentina | | oxyura ferruginea | species | 1 | 0 |
| argentina | | oxyura ferruginea | species | 1 | 0 |
| argentina | | oxyura ferruginea | species | 1 | 0 |
| argentina | chubut province | oxyura ferruginea | species | 1 | 0 |
| argentina | cordoba province | oxyura vittata | species | 3 | 0 |
| argentina | mendoza province | oxyura ferruginea | species | 3 | 0 |
| argentina | neuquen province | oxyura ferruginea | species | 6 | 0 |
| argentina | rio negro province | oxyura vittata | species | 17 | 0 |
| argentina | santa cruz province | oxyura ferruginea | species | 4 | 0 |
| australia | south australia | oxyura australis | species | 24 | 0 |
| australia | victoria | oxyura australis | species | 7 | 0 |
| bolivia | la paz department | oxyura ferruginea | species | 21 | 0 |
| bolivia | santa cruz department | oxyura ferruginea | species | 2 | 0 |
| canada | manitoba | oxyura jamaicensis | species | 0 | 1 |
| canada | manitoba | oxyura jamaicensis jamaicensis | subspecies | 19 | 0 |
| colombia | | oxyura jamaicensis andina | subspecies | 3 | 0 |
| colombia | choco department | oxyura jamaicensis andina | subspecies | 2 | 0 |
| cyprus | | oxyura leucocephala | species | 2 | 0 |
| ecuador | imbabura province | oxyura ferruginea | species | 1 | 0 |
| egypt | | oxyura leucocephala | species | 3 | 0 |
| el salvador | san salvador department | oxyura jamaicensis jamaicensis | subspecies | 1 | 0 |
| france | | oxyura jamaicensis jamaicensis | subspecies | 7 | 0 |
| germany | | oxyura jamaicensis | species | 2 | 0 |
| germany | | oxyura vittata | species | 2 | 0 |
| greece | | oxyura leucocephala | species | 7 | 0 |
| iran | | oxyura leucocephala | species | 1 | 0 |
| iraq | | oxyura leucocephala | species | 3 | 0 |
| italy | | oxyura leucocephala | species | 2 | 0 |
| kazakhstan | | oxyura leucocephala | species | 13 | 0 |
| mexico | baja california | oxyura jamaicensis | species | 0 | 2 |
| mexico | baja california sur | oxyura jamaicensis | species | 0 | 1 |
| morocco | | oxyura leucocephala | species | 6 | 0 |
| pakistan | | oxyura leucocephala | species | 3 | 0 |
| peru | junin region | oxyura ferruginea | species | 1 | 0 |
| peru | la libertad region | oxyura ferruginea | species | 1 | 0 |
| peru | puno region | oxyura ferruginea | species | 1 | 0 |
| russia | | oxyura leucocephala | species | 3 | 0 |
| south africa | gauteng province | oxyura maccoa | species | 12 | 0 |
| south africa | the western cape province | oxyura maccoa | species | 0 | 1 |
| spain | | oxyura leucocephala | species | 97 | 0 |
| spain | andalusia | oxyura jamaicensis jamaicensis | subspecies | 2 | 0 |
| spain | andalusia | oxyura leucocephala | species | 17 | 0 |
| spain | balearic islands | oxyura jamaicensis jamaicensis | subspecies | 1 | 0 |
| spain | basque country | oxyura jamaicensis jamaicensis | subspecies | 3 | 0 |
| spain | valencia | oxyura jamaicensis jamaicensis | subspecies | 6 | 0 |
| spain | valencia | oxyura leucocephala | species | 0 | 1 |
| tunisia | | oxyura leucocephala | species | 1 | 0 |
| turkey | | oxyura leucocephala | species | 2 | 0 |
| turkey | burdur province | oxyura leucocephala | species | 0 | 1 |
| ukraine | | oxyura leucocephala | species | 2 | 0 |
| united kingdom | | oxyura jamaicensis jamaicensis | subspecies | 1 | 0 |
| united kingdom | | oxyura maccoa | species | 6 | 0 |
| united kingdom | england | oxyura jamaicensis jamaicensis | subspecies | 4 | 0 |
| united kingdom | scotland | oxyura jamaicensis jamaicensis | subspecies | 2 | 0 |
| united kingdom | wales | oxyura jamaicensis jamaicensis | subspecies | 5 | 0 |
| united states | california | oxyura jamaicensis | species | 0 | 2 |
| united states | california | oxyura jamaicensis jamaicensis | subspecies | 10 | 0 |
| united states | delaware | oxyura jamaicensis | species | 0 | 1 |
| united states | florida | oxyura jamaicensis jamaicensis | subspecies | 7 | 0 |
| united states | georgia | oxyura jamaicensis jamaicensis | subspecies | 2 | 0 |
| united states | illinois | oxyura jamaicensis jamaicensis | subspecies | 1 | 0 |
| united states | indiana | oxyura jamaicensis jamaicensis | subspecies | 2 | 0 |
| united states | louisiana | oxyura jamaicensis jamaicensis | subspecies | 8 | 0 |
| united states | maryland | oxyura jamaicensis jamaicensis | subspecies | 5 | 0 |
| united states | montana | oxyura jamaicensis jamaicensis | subspecies | 1 | 0 |
| united states | nevada | oxyura jamaicensis | species | 8 | 0 |
| united states | nevada | oxyura jamaicensis jamaicensis | subspecies | 4 | 0 |
| united states | new jersey | oxyura jamaicensis jamaicensis | subspecies | 5 | 0 |
| united states | new york | oxyura jamaicensis jamaicensis | subspecies | 2 | 0 |
| united states | north carolina | oxyura jamaicensis jamaicensis | subspecies | 6 | 0 |
| united states | north carolina | oxyura maccoa | species | 1 | 0 |
| united states | north carolina | oxyura vittata | species | 1 | 0 |
| united states | pennsylvania | oxyura jamaicensis jamaicensis | subspecies | 1 | 0 |
| united states | rhode island | oxyura jamaicensis jamaicensis | subspecies | 2 | 0 |
| united states | texas | oxyura jamaicensis jamaicensis | subspecies | 5 | 0 |
| united states | vermont | oxyura jamaicensis jamaicensis | subspecies | 2 | 0 |