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% replaces any number of letters (la% - lake, lamp)_ replaces one letter (ca_ - car, cat)

Crossword clues for Caterpillar or tadpole:

LARVAE: Tadpole, caterpillar, etc.
LARVA: Caterpillar or tadpole
LARVA: Tadpole or caterpillar
LARVAS: Tadpoles and caterpillars