Traditional timing method

Traditional timing method

Inside an older pigeon clock

Some old style pigeon clocks use thimbles.

The traditional method of timing racing pigeons involves rubber rings with unique identification numbers and a specially designed pigeon racing clock. The ring is attached around the bird's leg before being sent to race. The serial number is recorded, the clock is set and sealed, and the bird carries the ring home. When the first bird returns, its trainer removes the ring and places it in a slot in the clock. The time that the ring was placed in the clock is recorded as the official time that the competing bird arrived home. From this time stamp an average speed is measured and a winner of the race can be found.
Although serving its purpose, this method has proved somewhat problematic for a few reasons:

• The pigeon's "official time" is not the actual time it arrived, it is the time the ring was removed, placed in the clock and recorded, which could be many vital seconds later.
• Exceptional pigeons may arrive home first on multiple occasions; knowing it is going to have the ring removed speedily, which may be uncomfortable, the pigeon could be reluctant to enter the loft for the trainer.