Brood Parasite: Golden-bellied Gerygones hosting a Little Bronze Cuckoo.
By Lee Kai Chong.
The Golden-bellied Gerygone, the smallest bird in Singapore, has known to nest in urban parks here. I did not see the nesting but I spotted a pair feeding a juvenile Little Bronze Cuckoo on the 23 July 2018 at our HDB neighbourhood park at Jurong West. I find this interesting that this is taking place right in the busy heartland park.
Both foster parents took turns to feed the juvenile cuckoo. Their favourite tree was the Mango tree because of the many tiny insects present. They had to do many rounds of feeding as the insects were too puny for such a large bird, stopping only for 5-10 minutes for the cuckoo to digest the food. Feeding started at the first light and continued throughout the day. I last saw them feed on the 27 July.
Many park goers were aware of the sound and sight of Little Bronze Cuckoo being fed by Golden-bellied Gerygone but don’t know what was going on. It may be because of their relatively small size, non stop movement during feeding under the canopy. When I showed them the photos, they were very surprised to see a such large young bird being fed by a smaller bird of a different species. I told them that this is ” Brood Parasite” an unusual breeding behaviour in our natural world. I am glad to show a bit of nature at our neighbourhood park to the residents there.