You use what is available..
I bet the Ojibwa used string.

Old guitar strings are perfect if you know anyone with a guitar. They already have a loop that won't lock up already formed.

search for "squirrel" on this forum and find all kinds of inventive and clever squirrel deterrents and other "such" threads. you'll be amused, guaranteed.

Squirrel snaring is probably illegal in your state but I can't say for sure. All you need is some copper craft wire in 22 or 24 gauge. It's not very thick and is pretty flexible. Cut it into pieces about 18 to 24 inches long. Wrap one end around a pencil twice and spin the pencil to make a loop. Pull the pencil out. Put the other end of the wire through the loop you just made to make the snare loop. It should be a 2 1/2 to 3 inch circle. Attach the snares to a pole leaned against the tree starting 1 1/2 feet from either end. Place 6 or 8 snares on the pole. Make sure the snare loop is around 1 to 1 1/2 inches off the pole which is about the height the squirrel's head is when they walk. I'll post a link of another squirrel control method that can be made with household items.

Here is a link that might be useful: Another method of squirrel control...

I would search here for "Squirrel Bon Bon's" and "Bucket of Death". But, be prepared... some of the conversations are a bit heated. -Glenn