The Blue-crowned Hanging Parrot (Loriculus galgulus) is a small parrot found in South-east Asia from southern Thailand to Peninsular Malaysia and Borneo.
It Singapore they are more commonly found in the forest reserves, Singapore Botanical Gardens, and gardens where fruiting trees are present. There have been reports of sightings in the city centre but one is not likely to find them all that often there.
In my early days of birding, this was one of the harder to find species, and it took me quite some time before finally photographing a few of them at Malcolm Park. They were fond of the oil palm fruits and the African Tulip flowers that were abundant there. The problem with finding the birds are two-fold. They are small in size (13cm in length) and they are green, which meant that they are well camouflaged.
There are of course easy ways to find them if you know their behaviour. They are fond of ripe fruits. A fruiting rambutan tree, or oil palm or a myriad others ripe fruits in the garden tend to attract them. So houses with ripening fruit trees near the forest reserves are likely to have them around. The other give-away of their presence is the sound they make while flying. A very shrill and high pitch “tsi” that once you recognise, will indicate their presence nearby.
A very good place to see them flying about is Jelutong Tower at the Central Catchment Nature Reserves. Every morning, there will be little torpedo-like little green birds flying straight and rather low, with their calls emanating loudly. If you are lucky, they will perch on a nearby tree, giving you better views.
Below are some pictures in the gallery with more information on separating the sexes and also a video of a juvenile feeding on a bunch of African Tulip flowers.