Also, can you still buy praying mantid egg cases this time of year? Would you recomend buying pray mantis egg case online? Fighting Pests with the praying mantis appeals to me. I've found a place online that sells either 3 egg cases or 6 egg cases. I suppose 3 would be more than enough and 6 would be an overkill for a small backyard. Although maybe the neighbors would appreciate it if they ended up with some in their backyard?