How does a bird find a worm when the worm is in the ground?

Worms crawl up when the earth is still cool and wet with the morning dew
in the morning, before the sun rises. This is also the time when the
early birds (who are pretty hungry) go hunting.

When a bird stands on the ground near where the worm is crawling around
underneath, believe it or not it can feel the vibrations with its feet.
Additionally, the bird will cock its head and zero-in on the sound with
their super-sensitive ears.

After the bird has located the worm through the vibrations and noises,
it will plunge down, grab the worm, and dine on breakfast. Ever hear
the phrase, "the early bird gets the worm?"