The Smooth-headed drywood termite (Cryptotermes cavifrons) swarms
in the evening year-round, but especially in the spring.
Evening swarmers are attracted to lights. Night swarms usually contain
dozens, occasionally hundreds of swarmers.
They often fly directly into buildings structures and infest timber wood
directly with out the need for soil.
They typically first infest exposed wood such as window/door frames, trim,
eaves, attics, etc. These places are typical points of entry since access
is provided via man-made joints to allow the termite in.
Some call the termites "lazy" because of their unwillingness
to enter sides of exposed wood. When swarming, they usually re-infest
the same structure. Multiple colonies are often found in a structure or
single infestation site.
Cryptotermes drywood termites live in wood that has fairly low moisture
content and is not in contact with soil or any other moisture source.
They must get their needed moisture from the wood they live in, so they
are usually found in humid coastal or subtropical areas.
They can be transported to other areas in infested furniture, picture
frames, decorative wooden objects, or wood for construction.
Colonies of these termites are relatively small (fewer than 3,000 individuals),
and they increase slowly, requiring several years before any swarmers
are produced. They do not build mud shelter tubes, which are typical of
most species of subterranean termites.
Their damage is usually localized, but quite a bit of damage can result
from multiple colonies in one building or structure.
Crypototermes drywood termites can be successfully
eliminated by a variety
of methods that would not be effective against subterranean species.
Heating, freezing, microwaves, or high-voltage electric charges on or
into all or a portion of the infested structure, or wooden objects, can
kill off whole colonies.
Drywood termites live in the wood where they
feed. Colonies construct
nests in the wood itself and they do not require soil-to-wood contact.
Typically, drywood termite colonies are smaller and slower to develop
than those of either dampwood or subterranean termites.
Drywood termites construct large galleries, both across and with the wood
grain and undermine the stability of timber, causing limbs or entire trees
to fall or to become weakened.
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