Ladybugs!

These freshly hatched alligator-oid critters:

Ladybug larvae
Ladybug larvae

…. quickly become something even more fearsome, at least to aphids smaller than they are:

Ladybug Larva Eating Aphid
Ladybug Larva Eating Aphid (by Cheryl Hearty – CCE/DC)

Eventually they turn into Ladybugs who relentlessly stalk larger aphids on garden plants:

Ladybug with aphids
Ladybug with aphids

And then they do this and the wheel goes around:

Ladybugs mating
Ladybugs mating

Gardeners love them ever so much…