9. Birds rarely sing on the ground. They give calls and Chirps while flying or while perched on a bush fence post, or limb of a tree. If birds sing while on the ground, they would tell cats and other enemies thes location Bird do want to be on the ground when an enemy comes near. The paragraph is about .. a. why birds chirp, call or sing b. what lines on the ground where birds usually keep silent d. why birds like trees​