If you're like me, and have to pack dozens of these each year, you'll notice moreso than many other species, jacksoni and stigmurus like to backpedal, ignore straws, and do everything they can to avoid going into a straw for safe packing. I've finally accidentally discovered a fun solution.
Note, this has worked for me in packing 15 in the time it normally takes to pack 3-4.
Obtain a container to let them scurry around in that has divets on the edges. Typically these are stackables you find at Walmart/Container Store.
Place your stuffed straws to "trap" them.
Next, just tap them and they'll run right into the straws. It seems to help them not be so afraid and nervous of the straws cramped quarters, and make it seem more like a safe place to hide, since theyre already in a "safe" rivet, and they probably dont know the straw is a different rivet.
In this case, the large Wendy's straws are the exact size of the rivets, which makes this ideal.
Thanks for reading, and I hope this helps others as well.