I am going to build some swarm traps this weekend and get them out. I have read several different ways to build the traps but I was wondering about the ventilation. Some say to make ventilation holes in the traps and some don't mention it. I am using five frame nuc boxes for my traps. Is it necessary to have ventilation holes in the trap? If so, how many? I assume that if it is necessary that I will need to put some screen over them so the bee wont get out of these holes during transport?