If you know of a lake or pond where crappies are common, they can be readily caught during their spawning season. During this time of the year, they are also VERY EASY to sex. If one is looking to add crappies as a bonus variety fish, I like the idea of catching single sex crappies and transferring them to your pond. When crappies don't reproduce and are kept low in numbers, they can really pack the size on.