Four men have pleaded guilty in Kenya to trying to smuggle hundreds of highly sought-after ants out of the country.

The Kenya Wildlife Service (KWS), which is more used to protecting larger creatures, such as lions and elephants, has described this as a "landmark case".

The contraband included giant African harvester ants, which are valued by some UK dealers at up to £170 ($220) each.

The case showed a "disturbing shift in trafficking patterns - from iconic mammals to lesser-known species that are vital to ecological balance", the KWS said.