The Blue-winged Leafbird (Chloropsis cochinchinensis) is found mainly in North-East India through South East Asia. It is the commonest of the 3 species of leafbirds in Singapore. It can be found in Bukit Timah, Central Catchment Nature Reserve, Southern Ridges extending to Mount Faber and even Sentosa Island.
The male differs from the female in appearance (see pictures below). They are normally found in pairs and sometimes in a small flock. Normally, they are hard to spot unless on the move while feeding or flying to a new destination due to their green colouration.
One of the benefit of Jelutong Tower in spotting of leafbirds is that it has a good view of the surrounding forest, so the movement of leafbirds are easy to monitor. The other reason is that the leafbirds like the plants around the tower, particularly the Poikilospermum climber. It has also been seen feeding on insects.