| cyprus | | larus michahellis | species | 1 | 0 |
| france | | larus michahellis | species | 1 | 0 |
| france | alsace region | larus michahellis | species | 1 | 0 |
| georgia | | larus michahellis | species | 1 | 0 |
| georgia | guria region | larus michahellis | species | 1 | 0 |
| greece | crete region | larus michahellis | species | 3 | 0 |
| greece | crete region | larus michahellis michahellis | subspecies | 1 | 0 |
| italy | campania region | larus michahellis | species | 0 | 1 |
| italy | sardinia autonomous region | larus michahellis | species | 0 | 1 |
| malta | | larus michahellis | species | 2 | 0 |
| netherlands | | larus michahellis michahellis | subspecies | 1 | 0 |
| portugal | | larus michahellis atlantis | subspecies | 1 | 0 |
| portugal | lisboa district | larus michahellis atlantis | subspecies | 3 | 0 |
| portugal | madeira autonomous region | larus michahellis | species | 1 | 0 |
| portugal | madeira autonomous region | larus michahellis atlantis | subspecies | 7 | 0 |
| romania | constanta county | larus michahellis | species | 4 | 0 |
| spain | | larus michahellis | species | 14 | 0 |
| spain | canary islands | larus michahellis | species | 1 | 0 |
| spain | canary islands | larus michahellis atlantis | subspecies | 3 | 0 |
| spain | catalonia | larus michahellis | species | 0 | 2 |
| spain | galicia | larus michahellis | species | 5 | 4 |
| spain | galicia | larus michahellis atlantis | subspecies | 1 | 0 |
| spain | galicia | larus michahellis michahellis | subspecies | 1 | 0 |
| spain | valencia | larus michahellis atlantis | subspecies | 1 | 0 |
| tunisia | sfax governorate | larus michahellis | species | 0 | 2 |