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Nesting Begins for Endangered Parrots
Saturday, February 12 2005 @ 02:57 AM UTC
Contributed by: MikeSchindlinger
Views: 7892
Conservation CARIBBEAN NATIONAL FOREST, Puerto Rico -- Raucous squawking erupts from cages filled with dozens of parrots -- a hopeful sound from a species on the brink of extinction. The last chance of survival for the Puerto Rican parrot may lie in forest aviaries where these captive birds began their nesting in January under close observation.

Researchers estimate only 30 to 35 Puerto Rican parrots remain in the wild, making it one of the world's 10 most endangered birds.

Associated Press Writer
Posted February 7 2005, 11:35 AM EST

Parrots across the Caribbean are similarly vulnerable after centuries of deforestation and trapping for the pet trade. From the Cayman Islands to the Dominican Republic, many species are rare, threatened or dwindling in numbers.

But in the past 30 years some conservation efforts across the Caribbean have shown modest success. In Puerto Rico, researchers say if they keep increasing the captive population of native parrots, the species could make a comeback.

"The more we breed here, the more we can release in the wild," said Bryann Ybarra-Weckmann, a U.S. Fish and Wildlife Service worker who feeds and monitors parrots at one of the island's two aviaries. "Last year we had our most successful breeding season ever. Ten birds survived."

All of the 159 captive Puerto Rican parrots will stay in the aviaries at least until next year, when a select group will be released after receiving training on how to forage for food and avoid predators in the wild.

Bright green with a red forehead and wings that flash turquoise in flight, the Puerto Rican parrot was called "Iguaca" by the Taino Indians after the sound of its squawk.

The bird was plentiful when Columbus arrived in the Americas and coexisted with a Puerto Rican macaw and parakeet that have since died out. Now the parrot can be seen only in the Caribbean National Forest, a mountain rain forest known to Puerto Ricans as El Yunque.

Posters with photographs of the birds raise tourists' hopes they may see one, but few ever do. The parrot aviary is closed to the public.

Although flocks of parrots can been seen flying over the U.S. territory's capital, San Juan, experts say those are nonnative varieties that have escaped from cages or been released over the years by pet owners.

The captive breeding program set up more than three decades ago has helped lift the Puerto Rican parrot population from a low point in 1975, when only 13 wild birds were recorded.

Forty parrots raised in captivity have been released since 2000, and next year more will be freed to establish a second wild population in the island's western Rio Abajo forest, near the second aviary, which is run by Puerto Rico's Department of Natural Resources.

In the meantime, eggs are appearing in nests inside the aviaries, and for the next five or six months researchers will be watching closely for hatchlings. Biologists have installed gaping plastic tubes on parrots' cages and have laid wood chips inside to resemble nesting spots in the cavities of the palo colorado, the main parrot nesting tree.

Helping the birds reach maturity is painstaking work. Ybarra-Weckmann said he has hand-fed many chicks. A veterinarian who specializes in parrots has saved some sick birds, but others have died from infections.

When released, parrots are fitted with radio transmitters to track their movements.

Some are killed by predators such as red-tailed hawks. Hurricanes also pose a major threat. In 1989, Hurricane Hugo cut the wild population from 47 to about 23, said Jafet Velez, a biologist with the Fish and Wildlife Service.

Thieves also have snatched parrots for the pet trade, stealing the top breeding pair in 2001 from the Luquillo Aviary in El Yunque. The birds have never been found.

Across the Caribbean, strict anti-smuggling laws and public awareness campaigns have helped curtail the illegal trade in parrots since the 1970s.

The number of St. Lucian parrots in the wild has increased from some 150 in the late 1970s to about 800 today. Scientists are optimistic a conservation campaign in Dominica is helping boost the Imperial parrot population, last estimated at 150.

But researchers remain worried about the fate of many species, largely due to the cutting of forests for construction and agriculture.

Experts say the Hispaniolan parrot -- once common in the Dominican Republic -- appears to be swiftly declining. In the Cayman Islands, the 300 to 430 remaining Cayman Brac parrots are confined to a tiny area.

"The trend in the region is that birds are just holding on, basically because of conservation efforts," said Stephen Durand, a parrot researcher in Dominica. "But how long can we continue to do this?"

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