A person who practices taxidermy is called a taxidermist. It is also sometimes used by taxidermists to construct the armatures of taxidermy mounts. Taxidermy specimens are usually the centrepiece of dioramas. She has expressed interests in taxidermy and entomology; she collects preserved skulls and insects. He has also developed an interest in collection of taxidermy art. Magnesium carbonate is also used in taxidermy for whitening skulls. He became an expert in the art of taxidermy. The process was a blend of taxidermy techniques and embalming chemicals. Rogue taxidermy (sometimes referred to as "taxidermy art") is a form of mixed media sculpture. The term "stuffing" or a "stuffed animal" evolved from this crude form of taxidermy. In particular instances more elaborate ruses were created using taxidermy or trick photography. There is also a room filled exclusively with taxidermy of various types of animals. When animals are preserved in this manner they are called "freeze-dried taxidermy" or "freeze-dried mounts". Freeze-drying is among the methods used to preserve animals in the field of taxidermy. In the late 1800s a style known as anthropomorphic taxidermy became popular.