Strong thread for deer hair head patterns

What strong thread do you use for tying/spinning deer hair heads?

Fly Tying: Spinning Deer Hair - Tips and Techniques

The Bullet Head

Spin, Flare & Shape - Page 3 of 3 - American AnglerAmerican Angler

ICERIO Cautery Tool for Fly Tying for Removing Loose Fibers or Burning Deerhair or Wool to Inlay Eyes

Deer Hair Caddis - FAOL

Book Excerpt: How to Tie the Deer Hair Sedge - Orvis News

Gone Fishing Guide Service. Upper Delaware River fishing and hand tied flies

More adventures in deer hair and articulation : r/flytying

Deer Hair n Grizzle tied on a Partridge L5A Dry Fly Supreme

How to Tie a Fly with Deer Hair

Fly Tying: Jeff Rowley - Humor and Creativity with an Edge. - Men's Journal

Recent Ties – Current Angler