Alberta has dozens of species of these predatory beetles. The most common are the native two-spot ladybug, and the introduced seven-spot ladybug.
Ladybugs Eat Plant Pests
Ladybugs are well known aphid hunters. During development each ladybug larva can consume hundreds of aphids or similar soft-bodied, sap-sucking garden pests.
What You Can Do
Like green lacewings, ladybugs are commercially available for biological pest management. These predators however are more manageable in closed systems, like green-houses, rather than in the outdoors.