
Behavior
A single larvae will eat about 400 medium size aphids during its development to pupal stage. An adult will eat about 300 aphids before it lays its eggs. Approximately 3 to 10 aphids are eaten for each egg laid, and a female will lay from 50 to 300 eggs in her lifetime. More than 5000 aphids may be eaten by a single adult ladybug in its lifetime. The scarce 7-spot is often found along with nests of wood ants.
Habitat
This beetle, and its larvae, inhabits a niche in the environment of nests of the ferocious Wood ants (Formica rufa agg.), where other Ladybirds are more readily scared off by the ants.References:
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