King rail
This rail forages in shallow water near cover and eats mainly aquatic insects and crustaceans. It forages by probing the mud while moving around in shallow water.
Wake Island rail
The ecology of this species is poorly known, though a review published in 2011 has shed more light on its life and subsequent extinction. It was numerous at the time of Lionel Walter Rothschild's first scientific description in 1903. The Wake Island rail inhabited "Cordia subcordata" scrubs and fed on molluscs, insects, worms and seeds which it found by digging up leaves and soil with its bill. Since its habitat offered no natural source of fresh water, it is assumed that the bird was able to subsist without drinking.