The PSNI has issued a warning to people about disturbing breeding waders and other ground-nesting birds.
It coincides with World Curlew Day next Monday and is being done in conjunction with the wildlife charity, Royal Society for the Protection of Birds (RSPB).
The number of breeding waders has declined sharply in recent years with species like the curlew, lapwing, redshank and snipe, now of conservation concern.
Early spring is a critical breeding time for waders.
Nesting birds are protected under the Wildlife and Natural Environment Act (NI), which makes it an offence to disturb or destroy a nest.
Superintendent Johnston McDowell, the PSNI's lead on rural and wildlife crime, urged people to enjoy the Easter weekend while respecting nature.
He said any report of reckless or intentional damage would be robustly investigated.
"In recent years we have seen some disturbances in county Fermanagh and particularly in the upper Lough Erne area, with people and dogs on private land noted to have disrupted, and in some instances damaged, areas in which birds such as rare curlews are known to nest and produce their young," he said.
The RSPB's West Conservation Manager said these birds "already face a multitude of threats and it is vital we support them and give them every possible chance to nest and rear young".
"Repeated disturbance at this time of year, especially when dogs are involved, could result in birds abandoning their breeding territories and nests," Seán Woods said.
In Northern Ireland wildlife crime can be reported on the non-emergency 101 number, or anonymously via the Crimestoppers website.
Under the law, it is an offence to take, damage or destroy a nest while it is being built or is in use; obstruct any bird from using its nest; take eggs or disturb a wild bird on the nest or any dependent young.
On conviction the maximum sentence is six months in prison and or a £5,000 (€5,800) fine.
