The word 'Bell' is the name given to the sound made by what type of animal?

Blue jays have many calls. The one that is probably most familiar is the "jay" call for which it is named. This probably attracts other jays to join a flock or serves as an alarm call. Another call sounds like a rusty pump handle, and another sounds like a bell. Blue jays also make rattling sounds. In the spring you can hear very soft singing.

http://animaldiversity.ummz.umich.edu/site/accounts/information/Cyanocitta_cristata.html

The word 'bell' as an animal sound (rather than 'sounding like a bell') applies to hounds and deer. It's not really the same as the sound of a (ding-dong) bell, but more related to bellow. Hounds on the trail are said to bell, and male deer in rut also. (And if you've ever heard that one in a pitch dark wood, about 20 foot behind you, after the feller standing next to you has just given a very good imitation of the call, you have my sympathy. There aren't many of us... Red deer can be extremely nasty in November.)