Answer: catbirds

AnswerCrossword Clue
CATBIRDS

They're sitting pretty

CATBIRDS

They have the best seat?

CATBIRDS

Wailing fliers

CATBIRDS
Feathered friends.
CATBIRDS
Feathered mimics.
CATBIRDSMewing fliers
CATBIRDSMewing passerines
CATBIRDSTheir calls sound like mewing