
These are species with at least one recorded territory in Hungary, 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 Hungary, 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

Anser anser

Vanellus vanellus

Circus aeruginosus

Falco tinnunculus

Larus cachinnans

Microcarbo pygmaeus

Chroicocephalus ridibundus

Calidris pugnax

Motacilla alba

Phasianus colchicus

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