Question 1: Which plant often hosts the eggs of the common blue?
A. Wild rose
B. Lavender
C. Bird’s-foot trefoil
The female common blue butterfly often lays eggs on bird’s-foot trefoil, a plant whose leaves serve as food for the emerging caterpillars.
Correct Answer: Bird’s-foot trefoil
Question 2: What is the main role ants play for common blue caterpillars?
A. Protect from predators
B. Build their cocoons
C. Help them fly faster
Ants are attracted to the honeydew produced by common blue caterpillars and, in return, often protect them from predators.
Correct Answer: Help them fly faster
Question 3: How do male common blue butterflies get their wing color?
A. Light reflection
B. Pollen coating
C. Pigment cells
The bright blue color of male common blue butterflies comes from microscopic wing structures that reflect light rather than from pigments.
Correct Answer: Light reflection