RFID Smart traps

Hello,

I am trying to find information on 'smart traps.'

I am planning to transponder urban rats with RFID tags. To estimate population size using mark-recapture methods, I would ideally like to place 'smart traps' that will record if an individual has an RFID and release the individual if it does. Ideally, it would also have the ability to release any animals that are not within a certain mass range to avoid bycatch.

I came across information from Sarah Knowles' group but wanted to see if there are any alternatives available.

http://www.knowleslab.com/research/new-technology-for-wildlife-monitoring/

Do you have any suggestions?

Thanks for your help,

Caitlin Black