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In certain biotopes, birds constitute the bulk of the diet of various carnivorans, e.g., of adult leopard seals that mostly prey on penguins, the Arctic fox living in coastal areas where colonies of murres, auks, gulls and other seabirds abound and stoats in New Zealand against whom flightless birds like the takahē and kiwi are defenseless.
Depending on the cone crop as well as the tree species, a single Clark's nutcracker can cache as many as 98,000 seeds per season. [7] The birds regularly store more than they actually need as insurance against seed theft by other animals (squirrels, etc.), as well as low availability of alternative foods; this surplus seed is left in the cache ...
granivores: (sometimes called seed-eating): birds that forage for seeds and grains, [149] such as geese, grouse and estrildid finches. [ 141 ] [ 146 ] herbivore : birds that predominantly eat plant material, and mostly do not eat meat; especially of birds that are both granivorous and frugivorous or are grass eaters, such as whistling ducks ...
The seedeaters are a form taxon of seed-eating passerine birds with a distinctively conical bill. Most are Central and South American birds that were formerly placed in the American sparrow family (Passerellidae), but are now known to be tanagers (Thraupidae) closely related to Darwins finches .
A more mundane explanation is that individuals co-operate in sharing information about carcasses of large mammals because they are too big for just a few birds to exploit. [76] Experiments with baits however show that such recruitment behaviour is independent of the size of the bait.
Commercial bird food is widely available for feeding wild and domesticated birds, in the forms of both seed combinations and pellets. [9] [10]When feeding wild birds, the Royal Society for the Protection of Birds (RSPB) [11] suggests that it be done year-round, with different mixes of nutrients being offered each season.
The apostlebird (Struthidea cinerea), also known as the grey jumper, lousy jack or happy family, [2] is a quick-moving, gray or black bird about 33 cm (13 in) long. It is a native to Australia where it roams woodlands, eating insects and seeds at, or near, ground level.
Birds' diets are varied and often include nectar, fruit, plants, seeds, carrion, and various small animals, including other birds. [79] The digestive system of birds is unique, with a crop for storage and a gizzard that contains swallowed stones for grinding food to compensate for the lack of teeth. [ 149 ]
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