Crossword clue: warm-blooded egg-laying vertebrates characterized by feathers and forelimbs modified as wings

The most common answer is bird (4 letters).

1 answer found in Letterora's clue database (Wikidata facts, Open Trivia DB, WordNet and Webster definitions — all licensed sources).

Possible answers

bird 4 letters wn-def

warm-blooded egg-laying vertebrates characterized by feathers and forelimbs modified as wings