Yes, they are fairly rare. What's more, with 140 per*exp, you can only see a small fraction of them. Make sure to raise it to 440+, so that you don't miss any while travelling.
If 110 is the minimum, then about 220 is the base, which you will them 50% of the time, and at 440 you will see them 100% of the time. Also, they are rare and everyone else is also looking for them.
Jackard wrote:
Sotsa wrote:I'm sad to see a wizard has shrunk your cabin and put it in a bottle. better luck next time.
Wiki says they only spawn within 8 tiles of shallow water, in deep water, so rivers and the shores next to the land on lakes are you best bets, i guess.