What things did the egyptians mummify?

Other than Ancient Eyptians Birds were mummified because they were sacred to the underworld. Then cats, cows, oxan, and camels were mummified any animal they could find or get their hands on. They had used Natron to dry out the body because one day they found an oxan laying in the sun decaying and drying out from sun and Natron. Natron was found bordering the Nile River which many slaves had dug up and worked hours to get perfect Natron to use on Mummification Project.