Least Terns in Sebastian, Florida

FWC sets the shorebird breeding season for Indian River County, which includes Sebastian, at March 1 to September 1, and least tern eggs are usually laid from mid-April into May.

FWC's regional table lists the breeding season for Indian River County as March 1 to September 1, the same window it gives neighboring Brevard County (FWC shorebird nest dates and contacts). Statewide, FWC's April 24, 2026 release gives the overall shorebird and seabird season as February 15 to September 1, noting that timing may vary by region and county (FWC, April 2026). FWC's March 4, 2026 release adds that from this time of year and through the summer, many shorebird and seabird species nest directly on beaches across the state, where their eggs and chicks are camouflaged in the sand (FWC, March 2026).

The least tern itself arrives in early spring from wintering grounds in Latin America. FWC's species profile says the birds lay from mid-April in south Florida to the first of May in the north, eggs hatch after 21 days, and the young do not begin to fly safely until about three weeks after leaving the nest (FWC least tern profile). A Sebastian colony started in late April can therefore still hold flightless chicks into June.

Least terns nest on open beach sand and on flat gravel roofs, and the last published Indian River County rooftop survey, from 2010, found no active colony inside Sebastian.

In a May 2012 column, the Pelican Island Audubon Society reported that in 2010, the latest survey data then available, Indian River County had 59 breeding pairs of rooftop least terns and none of the other rooftop species. Only two sites were active, both in Vero Beach: Vero Bowl at 929 14th Lane and the Bealls and Office Depot building at 5950 20th Street.

Four former Indian River County rooftop sites were no longer active in that survey. Two were in Sebastian, the Publix at 9580 U.S. 1 North and the Winn-Dixie at 995 Sebastian Boulevard, and two were in Vero Beach, a Walgreens on 20th Street and the Macy's at the Indian River Mall on Route 60 (Pelican Island Audubon Society). The society tied the shift to the roof to beach development, beach raking, dune buggies, predation by crows, laughing gulls and raccoons, and disturbance by dogs.

That 2010 count is now 16 years old, and no newer public tally of Sebastian rooftop colonies appears on the society or FWC pages checked for this guide. Current nest records are kept in the Florida Shorebird Database, which FWC links from its beach-nesting shorebird page, so tern sightings on a Sebastian roof feed a record that has had no public Sebastian summary since 2010.

Least terns use Sebastian-area roofs because crowded beaches leave little open sand, and FWC estimates that about half of Florida's least terns now nest on rooftops.

FWC's April 24, 2026 release states that approximately 50 percent of Florida's least tern population relies on rooftops for nesting, and that most rooftop nesting occurs between April and September (FWC, April 2026). Its rooftop page explains that as beaches become more crowded, less space is available for ground nesting, so many of these birds turn to gravel rooftops to nest and raise chicks (FWC rooftop nesting). The species profile adds that least terns also build nests on gravel rooftops and respond quickly to improved habitat such as the dumping of dredged sand (FWC). That rooftop habit explains the former Sebastian and Vero Beach roof colonies.

Roofs are a fragile substitute in Indian River County. The Pelican Island Audubon Society warned that rooftops are not a long term solution because flat gravel roofs are being replaced with metal or rubber roofs that are not conducive to nesting, and it described volunteers rescuing chicks that often fall off rooftops. FWC lists the same hazard: frightened chicks may run off roof edges or fall into open drains and gutters (FWC).

A Sebastian building owner with nesting terns should hold routine roof work until after the season, call a Qualified Rooftop Monitor before anyone goes up, and contact the FWC regional shorebird biologist about permits.

FWC's rooftop page recommends that routine maintenance and non-emergency repairs be done during the non-breeding season, between October 1 and April 1, and asks that a Qualified Rooftop Monitor be contacted before anyone accesses a rooftop with nesting birds (FWC rooftop nesting). It states that removing eggs from a rooftop nest is illegal, and most often fatal, because the embryos die if they are not kept at the right temperature.

For unexpected repairs during the season, FWC's regional shorebird biologists can help building owners determine whether a permit is needed and how to apply (FWC, April 2026). Indian River County falls in FWC's Northeast Region, whose shorebird contact is reached at 352-644-3539 at the office at 9741 Ocean Shore Blvd. in St Augustine (FWC contacts). Where take cannot be avoided during an otherwise lawful activity, FWC may issue an Incidental Take Permit (FWC).

The two FWC pages give slightly different repair windows. The April 2026 release says to wait until the season ends in September, while the rooftop page names October 1 to April 1. A Sebastian roofer who books work between October 1 and April 1 meets both, and stays clear of the March 1 start of the Indian River County season.

FWC asks beachgoers at the Sebastian Inlet and elsewhere to stay at least 300 feet from nesting birds, keep out of posted areas and walk around birds on the sand.

In its March 4, 2026 release, FWC asked people to stay at least 300 feet away from nesting birds, keep out of posted areas, walk around both individual birds and groups, and check for Critical Wildlife Area closures, which are marked by signs on beaches and coastal islands and closed to public access (FWC, March 2026). The same release asks beachgoers to keep pets at home or, at a dog-friendly beach, on a leash.

FWC's standing beach-nesting page adds rules that fit the inlet's busy fishing beaches: never enter areas posted with shorebird or seabird signs, keep dogs leashed and away from nesting areas, keep cats indoors, dispose of trash so it does not attract predators, and do not fly kites near nesting birds (FWC). The Pelican Island Audubon Society made the Indian River County case in 2012 that birds read dogs as predators, which is why the leash rule matters on the Sebastian side of the inlet (Pelican Island Audubon Society).

Least terns in Sebastian are not federally endangered: Florida lists the species as State-designated Threatened, and the federal Migratory Bird Treaty Act also protects it.

FWC protects the least tern as a State-designated Threatened species under Florida's Endangered and Threatened Species Rule and notes that it is protected by the U.S. Migratory Bird Treaty Act (FWC least tern profile). The same profile still shows a federal status of Endangered in Midwest and Great Plains states. That line is out of date: the U.S. Fish and Wildlife Service published a final rule on January 13, 2021, effective February 12, 2021, removing the inland population, the Interior least tern, from the federal list due to recovery (USFWS). The delisted birds are the inland population, so the change does not alter protection at the Sebastian Inlet, where the state Threatened listing governs.

Last verified: October 14, 2026, on the FWC website.