With the onset of autumn, many insects are frantic to complete a portion of their life cycle: mating, laying eggs, or eating their last meal as a larva before metamorphosing into a pupa.
(many insects; are; frantic to complete a portion of their life cycle) (many insects; to complete; a portion of their life cycle)
many insects many insects
are to complete
frantic to complete a portion of their life cycle
a portion of their life cycle