The penguins ingest the oil as they preen their feathers, which changes the birds' immune systems, making them more vulnerable to disease. |
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Actually, I've been planning a whole column devoted just to birds' bills and their feet, so I won't say much about them here. |
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The beauty of the tree-lined, brick-paved street was perennially obscured during the birds' return. |
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Bombing birds' nests is actually a boon for bird-watchers, since the ones that survive become rarer, and more exciting to spot. |
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The relocation operation relies on the birds' excellent natural homing instinct, which compels them to return to the site where they hatched. |
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There was also concern that the height of the houses would interfere with the birds' flight paths by restricting their sight lines. |
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And evolution of any management strategy requires knowledge on depredatory birds' feeding guild structure, breeding and roosting ecology. |
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This manipulation severely diminished the possibility that the unpalatability of the moths affected birds' reactions to them. |
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The bright coloration is usually on the birds' underparts or is hidden when their wings are folded. |
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Grit is essential in most birds' diets, both as an aid to digestion and as a source of minerals. |
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The birds' wings are blue and their tails a rainbow of yellow, red, and blue. |
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Stalls sold everything from dried lizards and birds' claws to spanners, nails and toothpaste. |
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Lured into a folk chemist, I ducked beneath lizard claws and snake skins, dodged the birds' feet and goat horns. |
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Apart that is from the corridor to the toilets where a tape plays farmyard noises and birds' chatter. |
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It might be assumed that the birds' near-universal distribution led to comparable practices arising independently in different localities. |
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Females lay eggs in other birds' nests and leave the rearing to other species. |
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Moreover, in the high waters, coral reefs no longer could protect the islands and their birds' nests from storms and rough seas. |
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The birds' large gape and manoeuvrable flight help them to catch their prey. |
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Birdsong awakens us to the art of nature, birds' variety to nature's skill and imagination. |
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The birds' mother is also an awesome sight, as she flies onto the nest with a fish in her mouth to feed her young. |
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The young birds' mandibles begin to cross about two weeks after they fledge, and they learn to extract seeds soon after that. |
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The animals are placed in plastic dish tubs and, using a mixture of warm water and a dab of mild soap, rescue workers scrub the birds' feathers. |
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Smallie said the birds' natural habitat is the wetlands, and wetland conservancy is therefore urged. |
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According to the pigeon enthusiasts, powerful electromagnetic microwave radiation is destroying the birds' sense of direction. |
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The birds' weight, length, health, and species are recorded, then they are banded and released for their migratory trips. |
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Beaming the sound of the birds' natural predators, such as geese or owls, at their roosts scares the canaries away from the power lines. |
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I'd finished putting some chunky brass screws into the fence panels ripped loose by the rampaging Italian topiarists and was getting ready to fill up the birds' seed feeders. |
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She takes me across to one of the dried food stores where, in racks of jars behind the counter, are birds' nests waiting for their moment in soup. |
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Over-fishing of the birds' primary food source, the sand eel, is being blamed for the huge fall in numbers from 83,000 kittiwake 13 years ago to roughly 49,000 at present. |
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As many of you already know, cowbirds parasitize other, smaller birds by laying their eggs in other birds' nests, often those of thrushes, sparrows or warblers. |
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During the mating season, birds' attention turns toward nesting. |
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The rats which are a problem in the native forest are mainly the introduced ship rats which eat small animals, birds' eggs, young birds and many native fruits and plants. |
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The gamekeeper contracted bird fancier's lung, a serious disease contracted from working in a closed environment with the birds' feathers and droppings. |
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Just as the birds' Latin names are mixed up, so are the common monikers. |
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And a steady stream of twitchers, from all across the North West, made the journey after news of the birds' arrival was posted on a birdwatchers' website. |
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The unkindness of ravens at the Tower of London is about to enjoy the kindness of taxpayers, in a move designed to improve the birds' accommodation. |
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Every change of position flashes to view these diminutive birds' metallic coloring making the hummingbird an ideal subject for the chromolithographer and label collector. |
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They do also feed from pincushion proteas, but do not damage the flowers significantly because the bracts are too narrow to be pierced or scratched by the birds' claws. |
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If the birds' crests are shown to play a role in communication, then investigators may have a clue as to how ancient casque-bearing dinosaurs interacted. |
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Blue jays and crows rob smaller birds' nests, often those of robins and catbirds, of both eggs and young, while hawks may steal the same from the crows and jays! |
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The main job of the pool is to slake birds' thirst, not only on hot summer days but also in winter when natural sources of water may freeze solid. |
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At his father's prompting, the little boy began to mimic the birds' cries. |
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The team carried out meticulous studies of the birds' eggshells to show that speckled areas of shells are significantly thinner than unpigmented patches. |
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The metazoan parasite fauna of grebes and its relationship to the birds' biology. |
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He was born and bred there, fished in the river and scrumped apples and collected birds' eggs and went to school there. |
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I sensed the birds' presence, but I had no idea if they were Gambel's or scalies, even though the habitat read scaled quail. |
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Stoats regularly climb trees to gain access to birds' nests, and are common raiders of nest boxes, particularly those of large species. |
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Egg farmers do this to reboot birds' internal clocks so they start laying valuable eggs faster and, crucially, at the same time. |
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The family Viduidae do not build their own nests, instead they lay eggs in other birds' nests. |
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This association favours the hatterias which feed on the numerous insects attracted by the birds' excrement. |
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Some are notable for their ability to mimic sounds such as other birds' songs. |
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The findings also showed that high levels of glutathione indicated lower amounts of genetic damage in the birds' cells. |
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One of these breeds, the Golden Pheasant, is brightly colored and has a characteristic tail feather longer than the birds' body. |
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They have also been known to eat berries, birds' eggs, meat, nuts and honey. |
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The farmers trim the birds' beaks to keep them from pecking other birds, even though debeaking causes acute pain that recurs when the bird eats. |
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For instance, the bright-red paint used to depict flowers and birds' plumages was a common pigment from that era called cinnabar. |
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Blackhead, or histomoniasis, is caused by a microscopic parasite which attacks the birds' livers. |
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Preen oil is secreted and spread to straighten, protect, and waterproof birds' feathers. |
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Yet the unfeathered skin around the birds' eyes, an indicator of core body temperature, stayed about the same. |
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