21.   -- t may be the first cookbook to come with its own food source.

22.   A beaver then gnaws through huge trees, an important food source, and easily floats the trunks across the pond to be stored near its home.

23.   But food sources change throughout the year, having a profound effect on the quality of the meat.

24.   But several commissioners spoke of safety concerns about feeding sharks and the possibility that the predators could be conditioned to recognize humans as food sources.

25.   But there is much confusion about other food sources of calcium and the ability of calcium supplements to compensate for a dietary deficiency.

26.   Caribou are a vital food source for the grizzly bears, black bears, wolves and eagles that roam the tundra.

27.   Castecka said they could find no food source or other reason the ducks would be flocking to the highway.

28.   Crows, though, may be gone from their home base for the entire winter, especially when their territorial food sources are covered with snow.

29.   David Morris, a Native American instructor at Central Arizona College, says efforts are under way to revive the prickly pear as an Indian food source.

30.   Dragonflies, as most anglers know, are a favorite food source among bass living in small lakes and ponds.