Melenie in New Zealand sent an email to let me know about the work of Liyen Chong (who is also in New Zealand). Her works in embroidery are exclusively worked with hair. There is a long tradition of embroidering with hair in China and, Chong works with blonde, red and black hair. Having attempted embroidery with my own hair only once, I am astonished at the results she achieves.
Link (thanks, Melenie!)