The Bermuda Audubon is embarking on its annual count of wild birds and is asking the public for help.

This Saturday, 22 volunteers will take part in the National Audubon’s Annual Christmas Bird Count which, in its 122nd year, is the world’s longest-running wildlife census. Bermuda has been taking part for the last 47 years.

The volunteers will travel around the island from dusk until dawn counting every bird and bird species they see. Some will be out after dark searching for owls.

A spokeswoman for the society said in a letter to its members: “Collecting census data provides a picture of how bird populations have changed in time and space.

“This long-term perspective is vital for scientists and conservationists as they devise strategies to protect birds and their habitat.

“Bermuda is a ‘lifeboat’ for many migratory birds as they fly thousands of miles over the ocean to their wintering grounds.

“They stop here to rest, feed and gain strength for the rest of their long journey. Some of these birds stay for the winter months and migrate north in the springtime.

“Our CBC data adds to the greater understanding of the status of bird populations throughout the region.”

The census is divided into "count week" and "count day."

Count week starts today and runs until Tuesday, December 21.

The society would like to hear from anyone who spots any unusual birds during that period. Information may be e-mailed to info@audubon.bm or given over the phone by calling 735-0441.

The spokeswoman added: “If you see any bird watchers in your neighbourhood on count day, know they are on a mission.”