Rare birds of prey have got an official photographer to record their annual stay in Cumbria.
The corpses of several rare birds, along with poisoned bait and other evidence, were removed.
Four rare birds of prey have been discovered poisoned in Devon, the RSPB said.
National Trust managers fear rare birds, hares and vegetation could have perished due to the speed it spread.
The centre opened in 1993 as a place to rescue and care for rare birds of prey and exotic animals.
"The area was specially picked as it was well protected and had staff able to monitor the rare birds, " he said.
Pet-Tayto Corner features rabbits, ducks, geese, pheasants, 10 different types of rare birds and lots of especially colourful and unusual hens.
But it said persistent bad weather and low temperatures meant only half survived, while other rare birds including goshawks have also struggled.
Make no mistake, the authors conclude, successful innovators are rare birds.
As part of the behind-the-scenes panda experience, a private guide shuttles guests around the rest of the 260-acre preserve, which also houses red pandas, golden monkeys, cranes and other rare birds.
She described an incident where a keeper of show pigeons had 50 of his birds, including two rare birds imported from Germany, shot by airguns over the past five years.
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The beauty spot is part of the Berwyn Mountains site of special scientific interest, whose protected moors provide ideal habitat for rare birds such as the hen harrier and the black grouse.
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"Its markings show it's female and it's about the same size as a robin, but it's very rare to see these birds in the UK so it's causing quite a stir, " Mr Oliver said.
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It has some of the highest cliffs in Europe, which have large colonies of rare and endangered species of birds.
They also say that the dam threatens the wetlands at the river's mouth, which are home to migratory birds and the rare shiomaneki crab.
Among the birds that have not survived are rare red and black throated divers.
The reduced oxygen system will cover the archive storage areas on levels five and six, where rare items, such as Audubon's Birds of America and a Shakespeare First Folio, will be kept.
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Etosha is home to 114 mammal species -- several of which are rare and endangered -- and 380 species of birds.
Donana is to Spain what Yosemite is to the United States: It is home to rare wildlife and is a key stop for migratory birds.
From there, cameraman Eduardo Aragona and I drove two hours on a bumpy, red-dirt road to arrive at the Estancia Rincon del Socorro, the traditional Argentine ranch that the Tompkins operate, and where guests from around the globe come to get up-close looks at rare species of capybara, caiman, deer and scores of birds.
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Experts say that cross-infection to humans is still relatively rare and usually occurs where people have been in close contact with infected birds.
The Caspian, slightly larger than Germany, is a seasonal habitat for birds migrating from Europe and Asia, such as the flamingo and the rare white-tailed eagle.
The hedgehogs have been eating birds' eggs and chicks, leading to a big decline in the population of rare waders.
Environmentalists treasure Plum Island as a home to rare plants, a site where seals rest on rocks in large numbers, a stopover point for migratory birds and a habitat for endangered species like the roseate tern.
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