Churchyard beetle - Blabs gigas - ħanfusa tal-kantina |
The churchyard beetle is one of the larger
beetles of the Maltese islands. Some individual specimens can grow up to 37mm
long. It prefers to live in dark humid areas and can sometimes be found in
basements, cellars, cave entrances and obviously churches.
In Maltese this common species is known as ħanfusa tal-kantina.
The front wings of most beetles are hardened and
cover the abdomen and a pair of delicate wings. To fly, most beetles lift their
front wings and unfurl the hind wings. The churchyard beetle cannot fly because
its front wings are fused together and cannot be lifted.
Inability to fly could leave this species
susceptible to many predators but it compensates for its inability to escape
from danger by being able to secrete a pungent liquid from glands that are
found in the joints of its limbs. Any bird or mammal trying to eat one soon
learns to leave this disgusting insect alone.
Unpalatable insects such as the ladybird often
have bright warning colours to make them easily recognisable. The churchyard
beetle is jet black, probably, because it lives in dark places where colours
would not be of any use.
When threatened the churchyard beetle can also
change its posture to appear larger. It pushes its head against the ground and extends
its hindlegs so as to tilt its body so that its wings face its enemy.
Several closely related species that lives in
the Namib Desert on misty nights takes up a similar position to collect water
which forms on theirs body. The body then trickles down their back to their
head and mouth.
The churchyard beetle belongs to a family of beetles
known as the darkling beetles. A name they got because of their dark colour.
The darkling is a large family with more than 20,000 members. In Malta about
fifty species can be found a number of which are endemic to the Maltese
islands.
This article was published in The Times of Malta on 5 February 2014.
No comments:
Post a Comment