Johnny Wee photographed a Collared Kingfisher (Todiramphus chloris) with a vinegar crab (Episesarma sp.) in its bill. These smallish crabs are found in mangroves, living in burrows and often seen climbing along tree trunks to get out of the rising tide. They stay motionless to avoid the attention of predators, such as kingfishers and otters. Obviously this one failed to avoid being caught.
There are at least four species of these vinegar crabs in Singapore. They are so-called because in many parts of Southeast Asia they are caught and pickled in vinegar, fish sauce, soya sauce or salt. Teochew Chinese eat these pickled crabs with porridge, shell and all.