The grass eggar is a common moth. It can be seen
from October to November especially in areas where grasses and plants of the
pea family grow. In Maltese it is known as baħrija
tas-silla.
The grass eggar belongs to a family of moths
known as Lasiocampoidea in which we also find the oak eggar, which is known in
Maltese as baħrija tal-ballut and the
rare lackey moth which is known in Maltese as malakosoma.
In this family the females are generally
noticeably larger than the males a characteristic we find in all three species
found in the Maltese islands.
The grass eggar is found throughout Europe,
North Arica, and the Near East as far as southern Russia but is missing from
high altitudes. In some parts of its range, particularly in Central Europe, it
has become endangered because of eutrophication, agricultural intensification,
abandonment of grazing areas and fragmentation of habitat. In other parts of
its range especially around the Mediterranean it is still common.
In colder countries the moths are seen in the
warmer months especially in August and September. Wherever it occurs it prefers
nutrient-poor habitats with low-growing grass especially in dry limestone area
and thus finds a good habitat in the Maltese islands.
The female lays its eggs on the ground before
winter. The eggs hatch when the days start getting warmer and the caterpillars
form a cocoon before summer to hatch in autumn.
Like that of the oak eggar, the caterpillar is
covered in protective hairs. It feeds on a variety of grasses and plants of the
pea family. When the caterpillar is older it tends to change its diet to eat
more plants of the pea family.
The closely related oak eggar has a similar life
cycle but the adults can be seen flying in August and September. It is common only
in the Buskett area.
This article was published in The Times of Malta on 23 October 2014.
No comments:
Post a Comment