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Whether you are new to bird watching or an old hat, the terminology can be complex. Here is a primer on some basic terms as well as more sophisticated ones you should know. The act of oiling refers pretty much to what it sounds like. It is the application of oil to the wings and feathers during preening or through water contact. Air sacs are a section of a bird's respiratory system. They are attached to lungs and extend throughout the body cavity. Depending on the species, can temporarily store large amounts of air to cool the body and maximize oxygen intake. A Field mark refers to distinctive characteristics used by a birder to identify particular birds in the wild. Field marks can be coloring, shapes, size and so on. Birds are often cleaning themselves. This act is referred to as preening. Each species handles it differently, but a common characteristic is the use of the beak to clean wings and such. Not to be confused with anting. When a female lays eggs, the resulting eggs are known as a clutch. It has no relation to vehicles. The number of eggs in the clutch depends on the bird. Photoperiodism refers to the reaction of birds as well as other animals and plants to the changing amounts of sunlight in a day during the year. Breeding periods and migration are believed to be triggered by it. Bird designated as dabblers are ones that sit on the water and tip down to eat food, whether plants or animals, below the surface. Ducks are classic dabblers. Dabbling is the act of a bird sitting on the water and feeding by moving its head below the water line to access plants, bugs, animals and whatever it happens to eat. The speculum is a marketing area found on a duck. Many ducks have a patch of color on their wings. The color distinction and shape can be used for identification purposes. As you know, the legs of birds are odd. The tarsas is the element of the leg that is just below the leg and above the ankle. It is considered part of the ankle anatomy. Totipalmate is another way to identify a bird. The term refers to the webbing or lack thereof between the toes. Those birds with webbing have totipalmate. Non-totipalmate birds tend to have unconnected toes facing different directions. The nape of a bird is another potential classification mechanism. It refers to the area between the crown of the head and neck. It often is an area of demarcation, making it helpful in identifying the bird you are seeing. Nidifugous refers to a certain type of bird and the hatching process. Many chicks are born unable to take care of themselves. Nidifugous chicks are self-sufficient for the most part immediately after hatching. The important thing to understand about birding is the language is important, but not critical. Gaining an appreciation of our feathered friends through observation is the key.
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