Original: The size and the shape of the bill can tell us about the bird’s diet. Falcons grab their prey mid-flight, and hoopoes have long bills for digging.
Corrected: The size and shape of a bird’s bill can tell us about its diet. Falcons grab their prey in mid-flight, and hoopoes have long bills for digging.
Why these changes?
- I removed one "the" so the first sentence is shorter and smoother: "the size and shape" instead of "the size and the shape."
- I used "a bird’s bill" and "its diet" to make the meaning clearer: we mean any bird and its own diet.
- I added "in" before "mid-flight" because we usually say "in mid-flight."
- The rest of the sentence about hoopoes is fine.
Short version for a kid: Different birds have different shaped bills. A falcon catches food while flying, and a hoopoe uses its long bill to dig in the ground.