Once upon a time, uncountable centuries ago, a woman sat down to enjoy a curry supper with her husband. With hindsight, she ought to have been more alert: after all, her husband making dinner was no usual thing. But then, nor was the curry, for nestling amongst the spices and vegetables she discovered a tiny finger. All that was left of her infant son.

Suspicion, jealousy, alcohol and an excess of testosterone were just some of the other apparent ingredients found in that fateful dinner. A husband deeply suspicious of his wife’s fidelity; his acid distrust of his young son’s real paternity – it all came together in a grisly act of filicide. Murdering his uncertain heir, the man cooked and served up his tiny body to his wife.

Although murdering one’s child is relatively common (in America, for example, there are some 2000 cases per year), combining the appalling deed with fine dining is so rare as to be almost unparalleled. Yet, according to one of Sri Lanka's most dogged folk myths, this is precisely what occurred in that jungle one terrible night.

Unhinged by grief, the mother fled screaming into the forest, where the gods, exhibiting that kind of double-edged kindness that all ancient gods seem to excel at. They turned her into a bird – the ulama, or devil bird, or, to be still more exact, what is thought to be the Sri Lankan Spot-bellied Eagle Owl.

In his book “Seeing Ceylon,” published in 1965, the remarkable Renaissance Burger, R. L. Brohier, surveyor, historian and the driving force behind the Gal Oya Reservoir, the island’s largest water tank, famously described the “clucking strangling sobs” the bird makes - “a scream which froze the blood”, “a series of dreadful shrieks as if coming from a soul in great agony of torment.”

For so ghoulish and intemperate a description, this one has the rare advantage of being accurate. The owl’s call really does sound as if a small infant is being murdered, or his mother is wailing with inconsolable wretchedness. Long after the owl has flown away, the sound stays with you, not unlike a spicy meal itself or as if Beethoven’s Fifth had become entangled with Heavy Metal and once heard, never forgotten.

The owl itself is enormous – the sixth largest in the world, with a wingspan approaching six feet. Despite this, it is rarely seen, being not only almost wholly nocturnal but also sticking to the most impenetrable parts of extensive forests. Spotted in such places as Yala, Wilpattu, and Sinharaja, it has also been seen and – of course – heard in Kurunegala, Kandy, and Galagedera, with one dropping in with alarming mateyness several nights a year at The Flame Tree Estate & Hotel.

Its visual coyness is a great pity for the bird, which is something of a looker, resembling a ghostly and very aristocratic dowager, given to looking at the world with quizzical mistrust, its ashy white feathers picked out with dark highlights like the ermine Robe of State worn by British monarchs at their coronation. What betters any monarch is in its gorgeous horizontal ear tufts, which can be around 3 inches in length, making the bird’s head appear as if it has a pair of assistant wings of its own, a living, breathing Douglas DC-4.

Zealous vegetarians they are not, their diet consisting of meat, more meat, and then still more, in all shapes and sizes – from tiny cowering rodents to recorded feasts involving civets, jackets, deer, and even monkeys. They pass their carnivorous inclinations onto their young from the start, raising them on meat before taking them off for short hunting trips to learn the juicy arts of entrapment.

Thankfully, civilisation’s perpetual intrusions have had little impact on their status, and they are widely recorded by numerate ornithologists – this even though mating pairs tend to lay but a single egg a year. Sri Lanka marks the southernmost limit of their territory, which extends north to the Himalayas and east to Vietnam, making it, if not endemic to the island, then at least fully paid-up residents. Even so, they stand as something of a standard-bearer for the island’s owls in general, not just for their audacious glamour and history, but also that something quite so vast should live with such surreptitious ease in the modern world.

In this, they are not alone.

Almost 500 bird species have been recorded on the island, although arguments rage over how many are endemic to Sri Lanka. Experts argue that only somewhere between 34 and 23 are truly endemic – a mere 5 or 6 per cent of the avian population.

To put this in context, the authoritative International Ornithologists' Union classes 255 birds worldwide as owls of one kind or another. Looked at from this perspective, Sri Lanka is something of a high achiever - a country that has 0.01% of the world’s land mass hosts 0.8% of its endemic owl species. Altogether, the island is home to 12 owl species, nine of which are resident in other Asian countries, particularly around the Indian subcontinent, and one is a tourist.

Of these nine, the Brown Wood Owl most resembles its ulama peer, being almost as large and with a cry that – if not murderous – is loud and distinctive, somewhere between a bark and a scream, the exact sound being subtly different according to their passing nationality. Found in India, Bangladesh, Indonesia, Taiwan, and southern China, as well as Sri Lanka, their calls vary from soft and low in India to decidedly more forceful in Indonesia. Like the Devil Bird, it seems untroubled by the bellicose excesses of human impositions, being categorised as a species under no significant existential threat – though it likes to hide in deep forest, making its public appearances at night. Its plumage, brown on top but with wavy brown-white streaks on its belly, is no less lovely for coming from the Marks and Spencer’s end of feather fashion.

Just as brown as the Brown Wood Owl is the Brown Fish Owl, a species common throughout south and southeast Asia but which has inspired a healthy range of subspecies, the Sri Lankan version of which teeters on the giddy, celebrated edge of endemism. It is smaller and darker than its other fish owl cousins, about two feet in length and with an unremarkable white-brown plumage, not unlike a much-loved duffle coat. Its fondness for fish means it is most easily spotted around coastlines, lakes, and rivers, but it is also regularly reported in the deeper jungle. It found its way into western taxonomy through a drawing made by a Dutch colonist on the island, which was included in 1776 in an illustrated zoology book by Peter Brown, a London-based Danish conchologist and friend of Captain Cook’s great botanist, Joseph Banks. The picture’s inclusion in a book published by a professor in Göttingen some decades later pushed the little owl into the European mainstream, where Linnaeus himself seized on it for his groundbreaking “Systema Naturae,” the birthplace of modern scientific classification systems.

Like the Brown Fish Owl, the Sri Lankan bay owl is another owl that teeters on the festive cusp of endemism. There are only two variants of this species recognised globally: one from India’s Western Ghats and the other from Sri Lanka. Whilst scientists continue to argue about whether or not the Sri Lankan variant should be promoted into a recognized and distinctive separate species or not, the bird itself goes about its life with relative happiness, slightly but not too disastrously threatened by habitat loss, its democratic liking for homes as varied as cloud a tropical jungle and open grasslands, ens...