locomotive air brake

'10 February. The Peregrine flew north across the valley. He was half miles away, but I could see the brown and black of his wings, the shining gold of his back. The pale cream of his tail coverts looked like a band of straw twisted across the base of his tail. Thinking he'd return downwind, I went into fields with the river to watch for him. I stood in the lee of the hawthorn hedge, looking through it on the north, sheltered in the bitter wind' For wild animals, showing teeth doesn't imply smiles on the camera and photographers. The only reason for their exposing teeth is because face-up with brutal situation leading to battles for food, dating mate and territory. These fightings are always very intense but it shows how nature occasionally works and indicates view of cruel life.