Like saturated fat, polyunsaturates come from both animal and vegetable sources. But in the case of polyunsaturates, the animal source is limited to fish.
Sources: safflower oil, sunflower oil, corn oil, soybean oil, cottonseed oil, some margarines and mayonnaise made with these oils, fish, almonds, pecans.
Monounsaturated fat is derived mostly from fruits and nuts, but traces can also be found in meat. Like polyunsaturates, monounsaturated fat is liquid at room temperature.
Sources: canola oil, olive oil, peanut oil, peanuts, peanut butter, cashews, avocado.