How many letters does the top answer for “a small european bat (vesperugo pipistrellus); -- called also flittermouse.” have?

The most common answer is pipistrel (9 letters).

Crossword clue: a small european bat (vesperugo pipistrellus); -- called also flittermouse.

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

pipistrel 9 letters web-def

A small European bat (Vesperugo pipistrellus); -- called also flittermouse.

pipistrelle 11 letters web-def

small European brown bat