Jason Cho a.k.a jcho photographed a Blue-throated Bee-eater (Merops viridis) in the act of casting a pellet. The pellet is made up of undigested insect exoskeleton compacted in the gizzard and regurgitated some time after feeding.
An earlier post describe pellet casting by a Blue-tailed Bee-eater (Merops philippinus).
A copy of the publication, “Pellet casting by non-raptorial birds of Singapore” can be downloaded HERE
This post is a cooperative effort between NaturePixels.org and BESG to bring the study of bird behaviour through photography to a wider audience.