ELUSIVE Prowlers of the NIGHT
From the
large sized spot-bellied Eagle Owls to the smallest scope owls, Sri Lanka is
home to 12 different species of owls, with two of them found only here. Their
large eyes are perfect for night time hunting. Rather bulky head, giving it a
stout appearance and the ability to rotate 270o, keen eyesight even
at very low light conditions, a Sharpe beak and talons all perfectly merge to
produce the ultimate elusive prowler of the night – the owl.
Although
owls are considered as nocturnal birds of prey, very few such as the endemic
Chestnut Backed Owlet hunts during the day time. It was indeed a rare sighting
at Deraniyagala, quite rare species nesting not within the jungle, but in a hole
of a wooden utility pole close to a home garden. In this man made habitat, it
was astonishing to see that the couple seemed undeterred to all the commotion
that was going on.
Owl’s
peculiar head bobbing is a result of their asymmetrically placed ears, which
help them to pin point their prey in extreme low light conditions. Above all,
owls can fly without the slightest hum thanks to their in-built modified feathers.
Their calls, all different from one another may repel many in fear of the many
myths and legends that have lingered for thousands of years. The Devil Bird or
the Spot-bellied Eagle Owl perhaps has the most number of tales, for possibly
it is the only bird which possesses a more human like call in the deep jungles
of Sri Lanka. Although one might hear their call, to see one in the darkness
needs much patience and luck.
Many owls feed
on small mammals, or rodents, but the Fish owl as its name implies has
specialized in fishing. As a rule of thumb, if you hear an owl, look for the
tallest place possible – preferably an open area or even better a tall dead
tree. ‘Owl pellets’ are one of the best ways scientists use to assess the diet
of owls. These are in fact the undigested parts of the prey they consume such
as bones, nails and fur, which they regurgitate and are often found close to
their day roosting sites.
Seredib
Scops Owl, one of the small owls recently discovered from the Island, is the
last to be added to the list of endemic birds in Sri Lanka. The owl can be
found in the lowland rain forest of Sri Lanka. It’s unusual ‘poo-ooo’ call was
what helped to locate the bird, and interestingly is similar to a call of an
amphibians found in the same habitat, called the Nagao’s ramanella, a type of pug-snout frog. Although till very
recently Frog Mouths and Night Jars were considered to be owl- since they too
are nocturnal hunters very much similar in appearance to owls, genetic
evidences proved that they belong to an altogether different family but in Sinhala
their native names still remains as “Bassa” for owls in Sinhala.