birdwatcher

noun

1. A person who observes or identifies wild birds in their natural environment.

   “Alec Warner was gazing like a bird-watcher at Charmian, who plucked at the rug round her knees, waiting to tell her own story.”

   “It seems these days that as much as bird-watchers need birds, the birds may need the bird-watchers.”

2. (slang)A person who enjoys watching rocket launches.

   “In fact, on this night, the birdwatching is over for everyone, for the firing is cancelled. Nobody notifies birdwatchers officially, of course, so the exodus is scattered and gradual.”

   “[…] particularly those carrying astronauts, are the area's major drawing power, and each "advertised" shoot brings thousands of space age "birdwatchers".”

3. (humorous, slang)A person, especially a male, who delights in watching women.