
These are species with at least one recorded territory in Ukraine, not a national checklist: a bird list from eBird or Avibase is more complete. The counts follow recording effort as much as wildlife, so a country with more visitors and more naturalists will show more of both.
The species with the most open occurrence records in Ukraine, among those a photograph exists for. Most recorded is not most numerous: it rewards animals that are common, conspicuous and live where people go.

Corvus cornix

Erithacus rubecula

Larus cachinnans

Corvus frugilegus

Passer montanus

Nyctalus noctula

Dendrocopos syriacus

Ficedula albicollis

Capreolus capreolus

Ficedula parva

Calidris alpina

Apus apus
The reference database has no regions filed under Ukraine.
The field guide covers Ukraine on the map, but none of its species have an entry written for them yet.