The lesser drone-fly is a species of hoverfly
found around the Mediterranean from Portugal to Lebanon as well as in many
parts of Asia including the Caucasus, Nepal, northern Pakistan, northern India
and Iran. It is also found in many parts of Africa reaching as far as South
Africa. It has also been introduced in parts of North America particularly in
California and Florida where as often happens with introduced species it could
become a pest.
In Maltese it is called dubbiena tal-għajnejn irrigati.
The lesser drone-fly
is very similar to another very common species known simply as drone-fly, dubbiena
dakar in Maltese. The drone fly is slightly larger than the lesser
drone-fly and does not have its distinctive striped eyes.
These two species belong to the hoverfly family.
This family consists of about six thousand species found throughout most of the
world. They can be found in most terrestrial and aquatic habitats.
In the Maltese islands the family is represented
by no less than thirty species.
Many of
these species live on or near flowers and are usually brightly coloured. Many
species defend themselves by mimicking bees and wasps. They look like these
poisonous species and many spend a lot of time hovering like them in front of
flowers. Their mimicry is so effective that they often fool most people who are
not familiar with them.
Adult hoverfly feed mostly on nectar and pollen
but their larvae have a totally different menu. While the larvae of some
species feed on decaying vegetable matter several species feed on aphids and
other plant-sucking insects and are considered as very important agents of biological
pest control.
Hover flies are also important pollinators. Some
species are generalists. They visit the flowers of many species of plants while
others are specialists and visit a limited number of often closely related
species. Hoverflies use vision to locate flower. They prefer to visit white or
yellow flowers but sometimes they use olfactory clues to locate flowers
especially if they are not white or yellow.
This article was published in the Times of Malta on 29 October 2013.
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