Bees are flying insects closely related to wasps
and ants, and are known for their
role in pollination and for producing honey and beeswax. There are nearly
20,000 known species of bees in nine recognized families though many are
indescribable and the actual number is probably higher. They are found on every
continent except Antarctica, in every habitat on the planet that contains
insect-pollinated flowering plants.
Bees
have a long proboscis (a complex "tongue") that enables them to
obtain the nectar from flowers. They have antennae almost universally made up
of 13 segments in males and 12 in females, as is typical for the super family.
Bees all have two pairs of wings, the hind pair being the smaller of the two;
in a very few species, one sex or caste has relatively short wings that make
flight difficult or impossible, but none are wingless.
The
smallest bee is Trigona minima, a sting less bee whose workers are about 2.1 mm
(5/64") long. The largest bee in the world is Megachile Pluto, a leaf
cutter bee whose females can attain a length of 39 mm (1.5"). Members of
the family Halictidae, or sweat bees, are the most common type of bee in the
Northern Hemisphere, though they are small and often mistaken for wasps or
flies.
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