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Equine protozoal myeloencephalitis in various stages. Equine protozoal myeloencephalitis (EPM) is a disease that affects the central nervous system of horses. It is caused by a protozoal infection that is brought about by the apicomplexan parasites Sarcocystis neurona or Neospora hughesi. Most cases are caused by S. neurona.
The common brushtail possum has a head and body length of 32–58 cm (13–23 in) [ 7 ] with a tail length of 24–40 cm (9.4–16 in). [ 8 ] It weighs 1.2–4.5 kg (2.6–9.9 lb). [ 8 ] Males are generally larger than females. In addition, the coat of the male tends to be reddish at the shoulders.
Didelphimorphs are small to medium-sized marsupials that grow to the size of a house cat. They tend to be semi- arboreal omnivores, although there are many exceptions. Most members of this order have long snouts, a narrow braincase, and a prominent sagittal crest. The dental formula is: 5.1.3.4 4.1.3.4 × 2 = 50 teeth.
The common ringtail possum (Pseudocheirus peregrinus, Greek for "false hand" and Latin for "pilgrim" or "alien") is an Australian marsupial. It lives in a variety of habitats and eats a variety of leaves of both native and introduced plants, as well as flowers, fruits and sap. This possum also consumes caecotropes, which is material fermented ...
Virginia opossums can vary considerably in size, with larger specimens found to the north of the opossum's range and smaller specimens in the tropics. They measure 33–55 cm (13–22 in) long from their snout to the base of the tail, with the tail adding another 25–54 cm (9.8–21.3 in).
The common opossum (Didelphis marsupialis), also called the southern or black-eared opossum [2] or gambá, and sometimes called a possum, is a marsupial species living from the northeast of Mexico to Bolivia (reaching the coast of the South Pacific Ocean to the central coast of Peru), including Trinidad and Tobago and the Windwards in the Caribbean, [2] where it is called manicou. [3]
A Virginia opossum (Didelphis virginiana) playing dead. A barred grass snake (Natrix helvetica) playing dead. Apparent death[ a ] is a behavior in which animals take on the appearance of being dead. It is an immobile state most often triggered by a predatory attack and can be found in a wide range of animals from insects and crustaceans to ...
Snake venom. Snake venom is a highly toxic saliva [ 1 ] containing zootoxins that facilitates in the immobilization and digestion of prey. This also provides defense against threats. Snake venom is usually injected by unique fangs during a bite, though some species are also able to spit venom.