Dogs are strictly prohibited from entering the Cooper’s Island Nature Reserve, the Bermuda Audubon Society has cautioned the public.

Society head Andrew Dobson yesterday issued a “gentle reminder” that dogs, leashed or unleashed, aren’t permitted inside the reserve, which is was formerly used by NASA.

“I understand that people would want to walk in this beautiful area but people are probably unaware of the impact they might be having,” said Mr Dobson.

Calling the reserve “a very fragile, sensitive area”, he said even the sight of a dog was enough to stress the birds that find sanctuary there.

“Once a bird sees animals prowling anywhere nearby, they’re going to take off — so you’re disturbing them.”

Signs are posted at the main gate advertising the reserve’s policy, although some walkers are entering the site through a hole in the fence. “The area is classified as an Important Bird Area for its world importance for white-tailed tropicbirds, or longtails,” said Mr Dobson.

“An increasing number are breeding in the area and dogs could cause birds to abandon their nests. Also, unguarded nests can result in egg predation by crows, something that had a serious impact on longtail breeding last year.

“The beaches themselves host hundreds of shorebirds every year and can be seen at any month of the year. These birds are long-distance migrants and need the opportunity to feed along the shoreline before continuing their journey.

“Some species such as black-bellied plover, sanderling and ruddy turnstone spend the winter months here in Bermuda on those beaches. This is why dogs are not allowed on the beach at any time. We would hate to see dog owners facing a $1,000 fine.”