The beetles will be kept under tight
security |
London's
Natural History Museum has taken custody of 100 flesh-eating beetles
which will be used to strip animal carcasses down to bare bones.
Scientists come from around the world to study the museum's
collections of animal skeletons.
The beetles are to work on specimens sitting in museum freezers
that are earmarked for de-fleshing.
The 10mm-long carrion beetles are better at preserving bone and
collagen than chemical cleaning methods.
They can be kept at 25C, but with high humidity to stop them from
eating their own eggs.
Although the museum has been supplied with an initial colony of
100 beetles and beetle larvae, this number is expected to grow to
1,000.
"They aren't the most conventional colleagues but they do work
very hard," said Patrick Campbell, curator at the museum.
"The larvae
will eat the most and when the group is established they will get
through about two to four kg of flesh a week."
Colonies live and work in a climate-controlled "bug room" called
a dermestarium.
The beetles, which belong to the species Dermestes
maculatus, have been used for decades by museums to strip away
the flesh from carcasses so the skeletons can be studied.
Out to lunch
Using beetles to clean carcasses of their flesh and hide allows
every aspect of the bone to be preserved.
In the past, chemical agents such as hydrogen peroxide and carbon
tetrachloride were used for the same purpose.
But these strong chemicals penetrate bones, making them fragile
and destroy the molecular information they hold.
The bugs are commonly found in
roadkill |
They
also strip bare, hard-to-reach parts of the skeleton that were
previously impossible for preparators to clean.
By letting the beetles do the work, the bones and collagen are
not changed in any way, allowing scientists to gather information
about an animal's age, distribution and feeding patterns.
Researching the skeletal structure of animals can also help
identify new species.
However, because the insects will eat virtually anything in their
path, they will have to be kept under tight security, well away from
the museum's collections of stuffed animals and skins.
Skeletons removed from the dermestarium will be frozen and
cleaned before moving to other parts of the museum, to ensure the
beetles are not accidentally transferred to the collections.
However, the bugs generally leave dried blood, feathers and fur
well alone.
The beetles will initially be set to work on an orange roughy
fish (Hoplostethus atlanticus), a long-tailed fruit bat
(Notopteris macdonaldi) from the South Pacific islands of
Vanuatu and a rare Norwegian puffin hound (Canis familiaris).
The beetles were supplied to the museum by the Central Science
Laboratory.
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When the group is established they will get through about
two to four kg of flesh a week 
