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Bird migration is controlled primarily by day length, signalled by hormonal changes in the bird's body. [20] On migration, birds navigate using multiple senses. Many birds use a sun compass, requiring them to compensate for the sun's changing position with time of day. [21] Navigation involves the ability to detect magnetic fields. [22]
[3] [4] During summer and autumn, brown bears have been observed consuming large amounts of insects, [5] roots and bulbs, [6] salmon, [7] and other food sources depending on their location and the availability of food. During the autumn months, American brown bears consume a large amount of hard masts and berries. [6]
The California scrub jay hides caches of food and will later re-hide food if it was watched by another bird the first time, but only if the bird hiding the food has itself stolen food before from a cache. [72] A male Eurasian jay takes into account which food his bonded partner prefers to eat when feeding her during courtship feeding rituals. [73]
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Animal navigation is the ability of many animals to find their way accurately without maps or instruments. Birds such as the Arctic tern, insects such as the monarch butterfly and fish such as the salmon regularly migrate thousands of miles to and from their breeding grounds, [1] and many other species navigate effectively over shorter distances.
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Recipes compiled and published by the Des Moines Register include salmon mousse, fresh gazpacho, apple coleslaw, cabbage n' macaroni slaw, other slaws, soups, and dips, and various salads like turkey-melon, shrimp-yogurt and pasta-blackbean, including one gelatin-based salad made with 7Up, lemon-lime gelatin, crushed pineapple, marshmallow and ...