PROWL

[verb] - to move around quietly in (a place) trying not to be seen or heard, such as when huntingThere have been reports of a masked man prowling in the neighbourhood. [I]At night, adult scorpions prowl the desert for (= trying to catch) insects. [T](informal) Unable to sleep he prowled (= walked without purpose) (about/around) the hotel corridors. [I or T]