I this paragraph correct?
Many names for groups are quite interesting. Group names were commonly used at one time. Now only a few of them are rare, some like "a pride of lions" or " a school of fish." Yet some group names are really neat in describing, for example "a clutter of cats", "a cry of hounds", or "a knot of toads." Other names latch onto what the animals are like, for instance "a charm of goldfinches" or "an exaltation of larks." In conclusion, there are names that have no obvious meaning such as "a gam of whales" or "a grist of bees." I used to know even more of these unusual names. All of these names lend variety to the language.
It was correct when it was first written. However, you have plagiarized it making you a thief and this paragraph a plagiarism.
http://www.google.ca/search?q=%22I+used+to+know+even+more+of+these+unusual+names.+All+of+these+names+lend+variety+to+the+language.%22&hl=en&num=10&lr=&ft=i&cr=&safe=images