How many letters does the top answer for “small dun-colored north american flycatcher” have?

The most common answer is phoebe (6 letters).

Crossword clue: small dun-colored north american flycatcher

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

phoebe 6 letters wn-def

small dun-colored North American flycatcher

small brilliantly colored north american sunfish 50% similar → pumpkinseed