Some colleagues mentioned a group of Pheasant-tailed Jacana (Hydrophasianus chirurgus) at a wetlands site (at least 5 birds present) and I visited to observe feeding behaviour. One common feeding method is to swim in open water and pick prey from the water surface, especially from floating vegetation; what is actually taken is uncertain.
Most sources say their diet consists of insects, molluscs, other invertebrates. I observed them for a 1.5 hours and saw (with video) many such feeding episodes but all I could see taken (even with video grab images) was plant material – the opinion is that aquatic vegetation is ingested accidentally/incidentally while feeding on animal prey (see HBW 2020).
It is possible that they feed on a large number of small insects and invertebrates on the water surface. I saw some competitive feeding between the birds (defending their stretch of water) but this was not common; they could also feed communally. Post 2 and 3 show some feeding activity. A video of feeding behaviour is here: https://youtu.be/dVTE0MfrHgk
Jenni, D.A. & Kirwan, G.M. (2020). Pheasant-tailed Jacana (Hydrophasianus chirurgus). In: del Hoyo, J., Elliott, A., Sargatal, J., Christie, D.A. & de Juana, E. (eds.). Handbook of the Birds of the World Alive. Lynx Edicions, Barcelona.
Amar-Singh HSS (Dato’ Dr) – Ipoh, Perak, Malaysia
Location: Wetlands, Perak, Malaysia
Habitat: Extensive ex-tin mining area with pond/lakes, wetlands
Date: 17th February 2020
Equipment: Equipment: Nikon D500 SLR with Nikon AF-S Nikkor 500mm f/5.6E PF ED VR, handheld with Rode VideoMic Pro Plus Shotgun Microphone