Ester a female peregrine has been flying sharptail grouse for the last fourteen years with continued consistent success. On this flight she takes a good pitch, maybe 800-900 feet, while making into the covey, a single grouse gets up wide, and flys right back to the camera and Nate Birr who is filming. Ester begins her stoop, pumping on the way down to increase her speed and knock down force. She was at her cartwheeling weight 31.5 oz, and that means she is serious and determined to feed herself on grouse that morning. She hits the grouse very hard, it does cartwheel out of the air and hit the ground. Only to sidestep Ester and fly off,testimonial to this incredible grouse. Ester chases after the grouse for a short distance, but if she see's the grouse is not hurt, she gives up, and does not tail chase like Gyr's or hybreds, which I prefer, and comes back and remounts for more.