
These are species with at least one recorded territory in Malawi, 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 Malawi, among those a photograph exists for. Most recorded is not most numerous: it rewards animals that are common, conspicuous and live where people go.

Ploceus xanthopterus

Uraeginthus angolensis

Pycnonotus barbatus

Cinnyris venustus

Corvus albus

Ploceus cucullatus

Zosterops senegalensis

Cyanomitra olivacea

Cossypha heuglini

Merops pusillus

Ploceus intermedius

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