Assertion: botfly's larva | /r/CapableOf | feed on glandular secretions
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Source sentences:
text: The tsetse fly (as well as other Glossinidae, Hippoboscidae, Nycteribidae and Streblidae) exhibits adenotrophic viviparity; a single fertilised egg is retained in the oviduct and the developing larva feeds on glandular secretions.