Why is the interior least tern endangered?
Why is the interior least tern endangered?
Before the species was protected as endangered in 1985, the number of interior least terns had plummeted below 2,000 birds due to changes to river systems from dams, dikes, reservoirs and water diversions, which eliminated most of their historic nesting habitat.
Where are least terns found?
The interior least tern is a migratory bird species, nesting along freshwater habitats of the Missouri and Mississippi rivers and their major tributaries and overwintering in the Caribbean and South America.
Is the least tern endangered?
Least Concern (Population decreasing)
Least Tern/Conservation status
What does a least tern look like?
Breeding adults are pale gray and white, with a black cap, white forehead, and yellow bill. Nonbreeding adults have a dark bill, smudgy grayish crown, and may show a dark bar at the bend of the wing. The outer primaries are dark gray-black. Juveniles are similar to nonbreeding adults but scaly gray above.
What eats a least tern?
Habitat loss is a pressing threat to the species. In addition, encroaching development near beaches and estuaries increases access of predators like dogs, cats, crows, skunks, foxes and raccoons to tern nests. Larger birds of prey such as burrowing owls, peregrine falcons and American kestrels may feed on terns.
How long does a least tern live?
Along the Mid-Atlantic coast, Least Terns are often called “little strikers” colloquially. The oldest recorded Least Tern was at least 24 years, 1 month old when it was found in New Jersey in 1981.
What eats a Least Tern?
How long does a Least Tern live?
What eats California Least Tern?
Larger birds of prey such as burrowing owls, peregrine falcons and American kestrels may feed on terns. Recreational use of beaches is another disturbance to California least terns particularly because their nests lie in sand or mud underfoot.
How big is the least tern?
1.4 ozAdult
Least Tern/Mass
When does an interior least tern come to the breeding grounds?
The Least Tern’s call has been described as a high pitched “kit,””zeep,” or “zreep.” Life History Interior Least Terns arrive at breeding areas from early April to early June, and spend 3 to 5 months on the breeding grounds. Upon arrival, adult terns usually spend 2 to 3 weeks in noisy courtship.
How is the least tern different from other terns?
Least terns are distinguished from all other North American terns by their small size. Interior least terns can only be separated from eastern and California least terns by the geographic area used for nesting. Adult interior least tern. Photo by USFWS Interior least tern chick and eggs. Photo by USFWS
Where does the least tern breed in California?
The California Least Tern (Sterna antillarum browni), federally listed as endangered since 1970, breeds along the Pacific coast from central California to southern Baja California. The endangered Interior Least Tern (Sterna antillarum athalassos) breeds inland along the Missouri, Mississippi, Colorado, Arkansas, Red, and Rio Grande River systems.
How is the population of the least tern recovering?
The Service conducted a thorough review of the interior least tern and found that the interior population of the species has recovered based on the increase in its abundance and distribution, the implementation of beneficial management practices across its range, and existing regulatory mechanisms that protect migratory birds.