Question

WHEN THE KOEL SINGS
The South West Monsoon has set in and the nippy mornings are punctuated by the mellifluous call
of the koel. The bird has been the muse of great poets and writers and koel songs are associated
with rains. But have you ever noticed a koel tailing a crow in your neighbourhood? The sight is
most likely to take place in the monsoons, when crowsstart nesting
"Koels and cuckoos are cousins belonging to the same family. Both the birds lay eggs in the nests of
host birds," says N. Raveendran, a city-based birder. "Koels are entirely dependent on house
crows. They have also become common neighbourhood birds over the years. They are parallel
bird communities that co-exist. But they have a love-hate relationship."
The Asian Koel is a crafty avian parasite that's a dominant aggressive survivor. "It's a brood
parasite. The parent birds would push the eggs of the host to accommodate their eggs. In some
cases, even the newly hatched chick pushes the host's egg off the nest," reveals Raveendran. "It was
startling to see this happen at a nest in the city outskirts. The incubation period of cuckoos is 13 to
16 days and the period for crows is 17 to 20 days. That's how the cuckoo chicks hatch earlier than
crows and get fed and nursed by their surrogate parents."
The entire process of this parasite nesting precedes the rains. That's when the crows pair and build
nests. The male Koel is jet black in colour that's a keen observer of the crows. It's he who sings
beautifully. Birders and researchers have recorded over 16 different calls by males while females
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