Ear tag be deferred to some later date. Pigs, cattle and sheep are frequently earmarked with pliers that notch registered owner and/or age marks into the ear. Mares on large horse breeding farms have a plastic tag attached to a neck strap for identification; which preserves their ears free of notches. Dairy cows are sometimes identified with ratchet fastened plastic anklets fitted on the pastern for ready inspection during milking; however NLIS requirements apply to cattle - including both dairy and beef animals. More commonly coloured electrical tape is used as short term ankle identifiers for dairy animals to identify when one
Willie Smits impressed both by the orangutans themselves and by Smits' work in rescuing and rehabilitating them: "There are books that can be published, and books that have to be published." Smits and his work appeared in a number of documentaries, including: Willie Smits Willie Smits (born February 22, 1957, in Weurt, Gelderland, the Netherlands) is a trained forester, a microbiologist, conservationist, animal rights activist, wilderness engineer and social entrepreneur. He has lived in Borneo since 1985 and is an Indonesian citizen. While working as a forest researcher in East Kalimantan, Indonesia in 1989, Smits encountered a baby orangutan in a cage