What forms the center of a robin's natural menu, especially when nesting season demands high protein intake?

Answer

Earthworms, insects, and ground-dwelling larvae

Robins lean heavily toward invertebrates like earthworms and insects when protein demands are high, contrasting sharply with seed-eating birds.

What forms the center of a robin's natural menu, especially when nesting season demands high protein intake?
behaviorbirdfeedingRobinbird feeder