3 May 2014 Last updated at 11:03
Platte Saline is the last breeding colony of the ringed plover in the Channel Islands
After just six ringed plover chicks reached adulthood in six years, wildlife experts have urged the public to avoid nesting sites.
Tim Morley from the Alderney Wildlife Trust said human interference had a major impact on the only Channel Island breeding site for the birds.
He said in 2013 three of the chicks reached fledging age and one nest had already been seen this year.
He said if the issues continued they would consider fencing off the area.
Platte Saline in Alderney is home to the only known regular breeding population of ringed plovers in the Channel Islands.
Breeding season is from late April to July and the birds nest at the high tide line on the beach.