How many letters does the top answer for “one who describes animals, their forms and habits.” have?

The most common answer is zooegrapher (11 letters).

Crossword clue: one who describes animals, their forms and habits.

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

zooegrapher 11 letters web-def

One who describes animals, their forms and habits.

zoographer 10 letters web-def

One who describes animals, their forms and habits.

a description of animals, their forms and habits. 50% similar → zooegraphy, zoography