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Would you believe
that you can actually determine the temperature by counting the chirps
of a cricket? Crickets can detect even the slightest change in temperature
and this is reflected in the rate at which they "chirp" or sing. Wherever
you hear a cricket singing the temperature in degrees Fahrenheit is equal
to the number of chirps per minute, minus 92, divided by 4.7.
There
are 96 different species of crickets. They may be found throughout the
U.S. and Canada. Three species that we commonly find in our yards, fields,
gardens and even in our homes are; the field cricket, the ground cricket
and the house cricket.
In general, crickets
are shiny and are blackish to brownish in color. They range in size from
½ to one inch in length. They have rather large, spiny hind legs and antennae
that are long and thread-like.
Crickets lay their
small white eggs in moist soil, in cracks and crevices and sometimes in
slits in plant tissue. Field crickets lay about 150-400 eggs each. House
crickets lay about 50-150 eggs each. When the eggs hatch it takes young
nymphs about 9-14 weeks to develop into adults. In the Northern part of
their range they pass the winter in the egg stage and have only one generation
each year. In the Southern part of their range they remain active all
year round and may have as many as three generations each year.
All crickets prefer
to stay out of doors, but they will enter buildings, especially in the
winter, when the weather is cold. Crickets feed on plant matter and they
are generally just a nuisance pest. They are occasionally found in damaging
numbers in fields and gardens. In the home they will feed on wool clothing,
carpets and paper.
Crickets sing both
in the day and in the night. They sing to defend their territory and to
attract females.
Crickets are attracted
to lights and on occasions they will gather in great numbers around lighted
signs and buildings, often covering lighted walls and stacking up on sidewalks.
Some species have
been raised commercially, for decades, to be sold as fish bait.
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