A pellet , in ornithology, is a mass of undigested bird food parts that some bird species occasionally vomit. The content of the bird pellet depends on the diet, but may include an exoskeleton of insects, indigestible plant material, bone, feathers, feathers, bills, claws, and teeth. In eagles, pellets are called casting .
The passing of the pellets allows the bird to remove the indigestible ingredients from its proventrikulus, or glandular stomach. In birds of prey, pellet regurgitation works for the health of birds by other means, by "rubbing" parts of the gastrointestinal tract, including the throat. The pellets are formed in six to ten hours of feeding in a baggage of birds (stomach muscles).
Ornithologists may collect one species of pellets from time to time to analyze seasonal variations in their eating habits. One of the advantages of collecting pellets is enabling the determination of a diet without killing and bird surgery. Pellets are found in different locations, depending on the species. In general, roosting and nesting is a great place to look: for most eagles and owls, under a conifer tree; for owls, at the base of the cliff or in the granaries and silos; for other owl species, in burrows or in swamps and grasses.
Hawks and owls are gray or brown, and their shape ranges from round to rectangular or plug-shaped. In large birds, the length is one to two inches, and in the singer bird, about half an inch. Many other species produce pellets, including grebes, herons, cormorants, gulls, terns, kingfishers, crows, jays, dippers, shrikes, swallows, and most shorebirds.
Ornithologists examining pellets have found strange objects in them - even bird bands that once stick to smaller species consumed by predatory birds. In the United States, the cemetery owl pellets contain ribbons of tufted titmouse, black-covered chickadee, and American goldfinch. In 1966, golden eagle pellets in Oregon were found to contain a band placed on American pigeons four months earlier, and 1,600 km (990 mi) in southern California.
Hair, bones and other body parts (such as limbs, skin fragments, and even faeces) of rodents found in owl pellets can carry rogue viruses and viable bacteria. It is therefore advisable to sterilize the pellets in a microwave oven before studying. This is very important when using pellets in school. Recently, Smith et al. describes two outbreaks caused by pellets of Salmonella typhimurium in public schools. Rodents tend to avoid the owl pellets, apparently because of their infective potential.
Video Pellet (ornithology)
In falconry
In falconry, foundry involves feeding the eagle, which is then regurgitated to clean and clean the plants. Wild eagles will produce castings of their own accord, in the form of small pellets of feathers, feathers, and other undigested materials, spewed out a few hours after it is eaten. Of the fibers used for hawks in captivity, there are two types: feathers, and cotton; the latter of which is commonly in pellets about the size of hazelnuts, made of soft cotton soft, and delivered to the eagle ravine after dinner. In the morning, the eagle will eject them, at that time they should be examined for the colors and conditions to determine the state of the eagle's body. If they are discarded round, white, odorless, or very moist, then the eagle is healthy; if otherwise, especially black, green, slimy, or the like, the eagle is sick.
The feather casting is examined in the same way. The yellow feathers of the one-day-old rooster chicken, which is a common food among the eagles in captivity, can be enough to induce casting. However, rabbit fur and feathers from game birds are more suitable for this purpose.
Casting will occur at the same time every day, provided the eagle flies at the same time each day. Eagle in captivity is usually weighed immediately before being flown. If they were fed roughly the day before, they would have to throw it away before weighing it, to avoid inaccurate measurements.
Casting is an important part of eagle survival. Not only clean the plants, but the spit fibers cleanse the bacteria from the plant walls. If a hawk in captivity is not provided with these necessary fibers, and instead of being fed only meat, they will become seriously ill and can not be released into the wild.
Maps Pellet (ornithology)
References
External links
- Owl & amp; Owl pellets
Source of the article : Wikipedia
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