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Animals |
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Anyone with outdoor pets knows the variety of burrs and other
sticky seeds that so readily attach themselves to fur. Burdock is a familiar example. Upon
examination, youll see that burdock seed is covered with small hooked barbs. By
attaching themselves to any animal that wanders by, these seeds can travel great
distances. The hooks are so effective that an ingenious and observant inventor took their
cue and invented the hook-and-loop closure commonly known as Velcro.The woods and fields are filled with various berries in the
fallimportant food for birds and other animals fattening up for winter. Many of
these berries contain small, hard seeds that pass undisturbed through the birds
digestive tract, to be deposited (fertilizer and all!) in a distant spot. Unlike burrs
simply hitching a ride, berries provide nutrients that attract foraging animals, an
incentive that surely increases dispersal compared to the burrs that must lie in wait for
passersby.
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