Spidethunters, as the name implies, is supposed to feed on spiders. However, there has been “no record of web-robbing” (Wells, 2007) as its animal diet is not known.
Dr. Redzlan Abdul Rahman managed to photograph a Spectacled Spiderhunter (Arachnothera flavigaster) hovering in front of a bunch of banana flowers collecting nectar from the flowers.
As Dr Redzian writes, “This picture describes very well why Malays call it ‘Kelicap Jantung’ meaning bird that feeds on ‘jantung pisang’ (banana heart).”
It is well known that this spiderhunter feeds on nectar from flowers of banana (Musa), coconut (Cocos nucifera), African tulip (Spathodea campanulata), durian (Durio zibethinus) and Jacaranda filicifolia. What is not known is its animal food.
Wells, D.R. (2007). The birds of the Thai-Malay Peninsular. Vol. II, Passerines. Christopher Helm, London.