Fewer adult piping plover pairs in 2024
Beach-nesting piping plovers, a federally listed threatened species and Delaware state-listed endangered species, experienced a decrease in adult pair numbers but increased nesting success in Delaware during 2024.
Plovers are monitored and protected at Cape Henlopen State Park, Gordons Pond and Fowler Beach in the Cape Region.
Seven pairs of piping plovers were recorded nesting at The Point at Cape Henlopen State Park near Lewes by the Department of Natural Resource and Environmental Control’s Division of Fish and Wildlife, as well as 17 nesting pairs documented at Fowler Beach on Prime Hook National Wildlife Refuge near Milton, for a total of 24 nesting pairs. Before this year, pair counts in Delaware had steadily increased since 2016.
The pair count stabilized at 24 in 2021 and 2022, but sharply increased to 31 in 2023, according to Katherine “Kat” Christie, DNREC coastal waterbird biologist and leader of the Delaware Shorebird Project.
Piping plovers produced more fledglings in 2024 than in recent years – with 41 chicks raised to fledging, or flying age (25 days old), across the state.
Last year, 29 chicks were raised to fledging age after multiple instances of chick predation and severe weather events. In 2024, Christie said, several nest and brood failures were attributed to suspected predators.
“After low productivity in 2023, some former Delaware birds were reported breeding in other states in 2024, and ultimately we were back to hosting 24 pairs of plovers this year,” Christie said.
Sections of The Point and Fowler Beach are closed each year from March 1 through Oct. 1, to protect the nests from disturbance.
However, she said, prospects have become better for the piping plover’s recovery in Delaware and along the East Coast through partnerships between DNREC’s Division of Fish and Wildlife and Division of Parks and Recreation, the U.S. Fish and Wildlife Service and the U.S. Department of Agriculture’s Wildlife Services.
“Partners are working together to better understand the drivers of population change and behavior, such as a study investigating piping plover chick and fledgling movement,” Christie said. “Trained biologists fit each plover with a unique combination of plastic leg bands allowing them to be identified using a spotting scope or binoculars.”
No plover pairs attempted to nest at Gordons Pond at Cape Henlopen this year, after a pair tried but ultimately failed to establish a nest there in 2023.
Beach-nesting species update
In other beach-nesting bird species updates, two pairs of American oystercatchers nested at The Point, one pair at Delaware Seashore State Park, and one pair at Fowler Beach.
Although three nest attempts successfully hatched, no American oystercatcher chicks fledged on monitored beaches in 2024.
Least terns bred at The Point again this year, with 16 nesting attempts identified after no nests were seen in 2023.
Biologists were able to confirm seven hatched least tern nests, though no fledging was confirmed from the colony at The Point. The least tern colonies at Fowler Beach had higher success than the previous years, with a high count of 62 incubating adults observed, and at least 66 fledglings confirmed.
These nesting areas remained closed through Oct. 1, to provide an undisturbed foraging area for southbound migrant shorebirds, including many fledglings making their way out of their natal grounds for the first time.
During regular surveys, biologists observed adults and fledgling piping plovers, American oystercatchers, royal terns, ruddy turnstone, sanderling, semipalmated plovers, black-bellied plovers, lesser black-backed gulls and other species utilizing this stretch of beach on Delaware Bay. For more information, go to de.gov/shorebirds or email deshorebirds@delaware.gov.
