spotting hobby
hobby of searching for and observing a particular kind of object
ship watching
outdoor activity
twitching
a form of birdwatching with the intention of pursuiting a previously located rare bird
aircraft spotting
hobby and recreation of tracking the movement of aircraft
people-watching
observational pastime
amateur astronomy
hobby whose participants enjoy watching the sky
satellite watching
activity involving the observation and tracking of artificial satellites
bus spotting
hobby
car spotting
observation hobby