Robop

Robop is short for robotic bird of prey and is the name for a mechanical falcon that squawks and flaps its wings. The purpose of the Robop is to scare away pigeons.

In April of 2007 the Liverpool city council purchased 10 Robops in an attempt to rid the town center of unsightly pigeons. The cost per Robop is 2,000 pounds (4,000 USD). The results of this effort are pending.

Reference: http://apnews.excite.com/article/20070420/D8OKG3DG1.html