Photographers and birdwatchers have made many documentations on parrots feeding on the fruits of oil palms (Elaeis guineensis) – Red-breasted Parakeets (Psittacula alexandri) LINK, Long-tailed Parakeets (Psittacula longicauda), Rose-ringed Parakeets (P. krameri) and Blue-crowned Hanging Parrot (Loriculus galgulus) LINK, and the latest, also on Long-tailed Parakeets and other non-parrots LINK.
These parakeets and parrots generally eat the fruits in or around the palms, seldom, if ever, carry the fruits some distance away.
Apparently crows behave differently. Ecologist Prof Richard Corlett of the National University of Singapore’s Department of Biological Sciences, reports seeing Large-billed Crows (Corvus macrorhynchos) twice carrying a ripe oil palm fruit to a tree 25-30 metres away. There, they hold it under one foot and peck off all the flesh, leaving only the seed and surrounding fibres, which they drop to the ground. House Crows (Corvus splendens) are also known to behave the same way in India, according to him. But in Singapore?
Oil palms were grown in Singapore as garden and wayside plants some two decades ago. Since then these palms have been spreading gradually to many parts of the main island. This is despite the large fruits, too large for any surviving bird to swallow.
Richard presumes that one or both species of crow are responsible for the spread of oil palm here, but he would like some more observations. He is also be interested in other fruits that crows eat or carry off.
Can photographers and birdwatchers keep their eyes open to crows eating and transporting oil palm fruits? And other fruits as well?