Norfolk police are calling for suspicious activity around the theft of wild bird eggs in the county during spring and nesting season to be reported to them.
Nature reserves in the Eastern region are a prime target for egg thieves and their wardens work closely with officers and the RSPB Investigations Section.
Rare breeding birds are particularly sought after.
Wild birds and their nests are protected under the Wildlife and Countryside Act 1981 and Operation Compass is a highly-successful initiative to thwart and prosecture egg stealers.
When targeting species, thieves will often park away from a site and approach on foot or cycle, usually in the late evening or early morning. They often wait around all day to strike quickly.
Egg collecting is a big problem in the UK where there are some 300 individuals stealing eggs.