I have one extra adult pair of greater arid-lad katydid (or the red eye devil, or spiny katydid) which is predatory and large size katydid. After looking at how this species of katydid rip apart a huge grasshopper, it is capable of taking down any size of praying mantis (No doubt!) so if you plan to get one please keep it in individual cage and keep it away from any live mantis! The red eye devil is also easily agitated and will show a defensive threat pose immediately. Email me at [email protected] if interested.