How do robins find worms?

Robin locates earthworms by cocking its head to the side to see, once they land on grass. With eyes on the sides of its head, a robin has monocular vision and accordingly can see independently with each eye. 

According to Wild Birds Unlimited, a robin can consume up to 14 earthworms in a single day. Worms not consumed on the spot are often brought back to the nest to feed the young. The bird is especially drawn to open lawns immediately following periods of rain and after grass is freshly mowed, the conditions that make the bird to search for insects especially the earthworms.