A Bird Or A Man?

One morning a Red Robin was chirping in the tree of the yard of my Brooklyn apartment.

I've called from the top of a tree, over the mountain all the way to the sea. "Hello! Are you there?" Three times repeated my call hasn't succeeded. I've leaped from one branch to another. Now the morning heat hit my back instead. "Hello! Are you there?" Only a gust of wind perks my feathers, but no answer. I swivel and twist, looking for a friend I take the leap and fly away.