How many letters does the top answer for “an order of birds, including the genus apteryx.” have?

The most common answer is apteryges (9 letters).

Crossword clue: an order of birds, including the genus apteryx.

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

apteryges 9 letters web-def

An order of birds, including the genus Apteryx.

a genus of birds including the bustards. 50% similar → otis

a genus of birds including the nightingales. 50% similar → philomela

an order of birds, including the pigeons. 50% similar → columbae