| albania | | sciurus vulgaris | species | 2 | 0 |
| austria | | sciurus vulgaris | species | 15 | 0 |
| austria | styria | sciurus vulgaris | species | 1 | 0 |
| austria | tyrol | sciurus vulgaris | species | 6 | 0 |
| bolivia | beni department | sciurus spadiceus | species | 2 | 0 |
| brazil | acre | sciurus spadiceus | species | 0 | 2 |
| brazil | para | sciurus aestuans | species | 4 | 0 |
| brazil | rio de janeiro | sciurus aestuans | species | 0 | 1 |
| canada | | sciurus carolinensis | species | 1 | 0 |
| canada | british columbia | sciurus carolinensis | species | 0 | 1 |
| canada | ontario | sciurus carolinensis | species | 6 | 3 |
| canada | ontario | sciurus niger | species | 1 | 0 |
| canada | ontario | sciurus vulgaris | species | 0 | 1 |
| canada | yukon | sciurus carolinensis | species | 0 | 1 |
| canada | yukon | sciurus vulgaris | species | 0 | 1 |
| china | | sciurus vulgaris | species | 1 | 0 |
| china | jilin | sciurus vulgaris | species | 0 | 1 |
| costa rica | | sciurus variegatoides rigidus | subspecies | 2 | 0 |
| costa rica | | sciurus variegatoides thomasi | subspecies | 1 | 0 |
| costa rica | alajuela province | microsciurus alfari | species | 1 | 0 |
| costa rica | puntarenas province | sciurus variegatoides | species | 0 | 1 |
| czech republic | | sciurus vulgaris | species | 5 | 0 |
| denmark | | sciurus vulgaris | species | 90 | 0 |
| denmark | | sciurus vulgaris fuscoater | subspecies | 61 | 0 |
| denmark | region zealand | sciurus vulgaris | species | 0 | 1 |
| ecuador | loja province | sciurus stramineus | species | 0 | 1 |
| ecuador | manabi province | sciurus stramineus | species | 0 | 1 |
| finland | | sciurus vulgaris | species | 3 | 0 |
| france | | sciurus vulgaris | species | 6 | 0 |
| french guiana | | sciurus aestuans | species | 5 | 0 |
| georgia | | sciurus anomalus | species | 1 | 0 |
| germany | | sciurus vulgaris | species | 1 | 0 |
| germany | bavaria | sciurus vulgaris | species | 6 | 0 |
| germany | berlin | sciurus vulgaris | species | 0 | 1 |
| germany | north rhine-westphalia | sciurus vulgaris | species | 1 | 0 |
| greece | | sciurus anomalus | species | 8 | 0 |
| greece | | sciurus vulgaris | species | 1 | 0 |
| guyana | barima-waini region | sciurus aestuans | species | 2 | 0 |
| guyana | east berbice-corentyne region | sciurus aestuans | species | 2 | 0 |
| guyana | upper demerara-berbice region | sciurus aestuans | species | 1 | 0 |
| hungary | | sciurus vulgaris | species | 1 | 0 |
| indonesia | central sulawesi province | microsciurus flaviventer | species | 0 | 1 |
| indonesia | north sulawesi province | microsciurus flaviventer | species | 0 | 1 |
| iran | | sciurus anomalus | species | 52 | 0 |
| ireland | munster province | sciurus vulgaris | species | 1 | 0 |
| italy | | sciurus sp. 1 ag-2016 | species | 5 | 0 |
| italy | | sciurus vulgaris | species | 85 | 0 |
| italy | abruzzo region | sciurus vulgaris | species | 1 | 0 |
| italy | calabria region | sciurus vulgaris | species | 1 | 0 |
| italy | piemonte region | sciurus carolinensis | species | 0 | 1 |
| italy | veneto region | sciurus vulgaris | species | 3 | 0 |
| japan | akita prefecture | sciurus lis | species | 1 | 0 |
| japan | fukushima prefecture | sciurus lis | species | 2 | 0 |
| japan | gunma prefecture | sciurus lis | species | 2 | 0 |
| japan | hokkaido prefecture | sciurus vulgaris | species | 3 | 2 |
| japan | hokkaido prefecture | sciurus vulgaris orientis | subspecies | 0 | 1 |
| japan | ibaraki prefecture | sciurus lis | species | 13 | 0 |
| japan | iwate prefecture | sciurus lis | species | 52 | 0 |
| japan | kyoto prefecture | sciurus lis | species | 1 | 0 |
| japan | miyagi ken prefecture | sciurus lis | species | 22 | 0 |
| japan | nagano prefecture | sciurus lis | species | 1 | 0 |
| japan | niigata prefecture | sciurus lis | species | 10 | 0 |
| japan | okayama prefecture | sciurus lis | species | 1 | 0 |
| japan | shizuoka prefecture | sciurus lis | species | 10 | 0 |
| japan | tochigi prefecture | sciurus lis | species | 9 | 0 |
| japan | tokyo prefecture | sciurus lis | species | 1 | 1 |
| japan | yamanashi prefecture | sciurus lis | species | 2 | 0 |
| lebanon | | sciurus anomalus | species | 1 | 0 |
| mexico | federal district | sciurus aureogaster | species | 0 | 1 |
| mexico | morelos | sciurus aureogaster | species | 0 | 1 |
| mongolia | | sciurus vulgaris | species | 2 | 0 |
| norway | more og romsdal county | sciurus vulgaris | species | 0 | 1 |
| peru | amazonas region | sciurus ignitus | species | 0 | 1 |
| peru | loreto region | sciurus igniventris | species | 1 | 0 |
| poland | | sciurus vulgaris | species | 4 | 0 |
| portugal | | sciurus vulgaris | species | 20 | 0 |
| russia | | sciurus vulgaris | species | 3 | 0 |
| russia | irkutsk oblast | sciurus vulgaris | species | 2 | 0 |
| slovenia | | sciurus vulgaris | species | 2 | 0 |
| spain | | sciurus vulgaris | species | 15 | 0 |
| spain | balearic islands | sciurus vulgaris | species | 0 | 1 |
| switzerland | | sciurus vulgaris | species | 2 | 0 |
| syria | | sciurus anomalus | species | 8 | 0 |
| turkey | | sciurus anomalus | species | 33 | 0 |
| turkey | adana province | sciurus anomalus | species | 3 | 0 |
| turkey | adiyaman province | sciurus anomalus | species | 92 | 0 |
| turkey | amasya province | sciurus anomalus | species | 1 | 0 |
| turkey | antalya province | sciurus anomalus | species | 44 | 0 |
| turkey | aydin province | sciurus anomalus | species | 2 | 0 |
| turkey | bolu province | sciurus anomalus | species | 1 | 0 |
| turkey | burdur province | sciurus anomalus | species | 3 | 0 |
| turkey | bursa province | sciurus anomalus | species | 23 | 0 |
| turkey | canakkale province | sciurus anomalus | species | 7 | 0 |
| turkey | diyarbakir province | sciurus anomalus | species | 1 | 0 |
| turkey | hatay province | sciurus anomalus | species | 2 | 0 |
| turkey | icel province | sciurus anomalus | species | 1 | 0 |
| turkey | isparta province | sciurus anomalus | species | 1 | 0 |
| turkey | istanbul province | sciurus anomalus | species | 2 | 0 |
| turkey | karaman province | sciurus anomalus | species | 2 | 0 |
| turkey | kars province | sciurus vulgaris | species | 1 | 0 |
| turkey | kayseri province | sciurus anomalus | species | 1 | 0 |
| turkey | konya province | sciurus anomalus | species | 2 | 0 |
| turkey | malatya province | sciurus anomalus | species | 2 | 0 |
| turkey | mugla province | sciurus anomalus | species | 1 | 0 |
| turkey | ordu province | sciurus anomalus | species | 80 | 0 |
| turkey | samsun province | sciurus anomalus | species | 14 | 0 |
| turkey | tokat province | sciurus anomalus | species | 3 | 0 |
| turkey | zonguldak province | sciurus anomalus | species | 2 | 0 |
| united kingdom | | sciurus vulgaris | species | 1 | 0 |
| united kingdom | england | sciurus carolinensis | species | 0 | 6 |
| united kingdom | england | sciurus vulgaris | species | 9 | 11 |
| united kingdom | northern ireland | sciurus vulgaris | species | 0 | 1 |
| united kingdom | scotland | sciurus carolinensis | species | 1 | 1 |
| united kingdom | scotland | sciurus vulgaris | species | 9 | 4 |
| united kingdom | wales | sciurus carolinensis | species | 0 | 3 |
| united kingdom | wales | sciurus vulgaris | species | 9 | 1 |
| united states | | sciurus griseus | species | 1 | 0 |
| united states | | sciurus niger | species | 1 | 0 |
| united states | arizona | sciurus aberti | species | 0 | 2 |
| united states | arizona | sciurus aberti kaibabensis | subspecies | 0 | 2 |
| united states | arkansas | sciurus carolinensis | species | 0 | 1 |
| united states | california | sciurus carolinensis | species | 0 | 14 |
| united states | california | sciurus griseus | species | 7 | 12 |
| united states | california | sciurus niger | species | 0 | 6 |
| united states | colorado | sciurus carolinensis | species | 0 | 2 |
| united states | colorado | sciurus griseus | species | 0 | 1 |
| united states | colorado | sciurus niger | species | 0 | 4 |
| united states | connecticut | sciurus carolinensis | species | 0 | 3 |
| united states | delaware | sciurus carolinensis | species | 0 | 1 |
| united states | florida | sciurus carolinensis | species | 0 | 6 |
| united states | florida | sciurus niger | species | 74 | 2 |
| united states | georgia | sciurus carolinensis | species | 0 | 3 |
| united states | georgia | sciurus niger | species | 0 | 1 |
| united states | illinois | sciurus carolinensis | species | 0 | 1 |
| united states | illinois | sciurus niger | species | 0 | 2 |
| united states | indiana | sciurus carolinensis | species | 0 | 2 |
| united states | indiana | sciurus niger | species | 0 | 1 |
| united states | indiana | sciurus niger rufiventer | subspecies | 0 | 1 |
| united states | iowa | sciurus niger | species | 0 | 2 |
| united states | kansas | sciurus carolinensis | species | 0 | 1 |
| united states | kansas | sciurus niger | species | 0 | 1 |
| united states | kansas | sciurus niger rufiventer | subspecies | 0 | 1 |
| united states | kentucky | sciurus carolinensis | species | 0 | 1 |
| united states | louisiana | sciurus carolinensis | species | 0 | 3 |
| united states | louisiana | sciurus niger | species | 0 | 1 |
| united states | maryland | sciurus carolinensis | species | 0 | 3 |
| united states | massachusetts | sciurus carolinensis | species | 0 | 3 |
| united states | massachusetts | sciurus carolinensis carolinensis | subspecies | 0 | 1 |
| united states | massachusetts | sciurus niger | species | 0 | 1 |
| united states | minnesota | sciurus carolinensis | species | 0 | 1 |
| united states | mississippi | sciurus carolinensis | species | 0 | 1 |
| united states | mississippi | sciurus niger | species | 0 | 1 |
| united states | missouri | sciurus carolinensis | species | 0 | 3 |
| united states | nevada | sciurus carolinensis | species | 0 | 1 |
| united states | nevada | sciurus griseus | species | 0 | 1 |
| united states | new mexico | sciurus aberti | species | 0 | 1 |
| united states | new york | sciurus carolinensis | species | 0 | 5 |
| united states | new york | sciurus niger | species | 0 | 1 |
| united states | north carolina | sciurus carolinensis | species | 0 | 1 |
| united states | ohio | sciurus carolinensis | species | 0 | 2 |
| united states | ohio | sciurus niger | species | 0 | 1 |
| united states | pennsylvania | sciurus carolinensis | species | 0 | 2 |
| united states | pennsylvania | sciurus niger | species | 0 | 1 |
| united states | south carolina | sciurus carolinensis | species | 0 | 1 |
| united states | tennessee | sciurus carolinensis | species | 1 | 0 |
| united states | texas | sciurus carolinensis | species | 0 | 1 |
| united states | texas | sciurus carolinensis carolinensis | subspecies | 0 | 1 |
| united states | texas | sciurus niger | species | 0 | 2 |
| united states | virginia | sciurus carolinensis | species | 0 | 7 |
| united states | virginia | sciurus niger | species | 0 | 3 |
| united states | washington | sciurus carolinensis | species | 0 | 1 |
| united states | washington | sciurus griseus | species | 0 | 1 |
| united states | west virginia | sciurus carolinensis | species | 0 | 1 |
| united states | wisconsin | sciurus carolinensis | species | 0 | 2 |
| united states | wyoming | sciurus niger | species | 0 | 1 |