A rafter, smack, charm

I've learned a lot of things from researching for Throbbing Brains. Most recently, I learned a lot of animal plurals. A group of turkeys is referred to as a "rafter" of turkeys. A group of jellyfish is a "smack" of jellyfish. Hummingbirds = a charm, hippos = a herd or bloat, gerbils = a horde, hedgehogs = an array. The turkey one can actually be used for about a month each year, around Thanksgiving time. The others have more limited applications, but if you're determined, you can definitely include them in conversation.