UPVC windows are cleaned with water and vinegar mixed in a sprayer. Jupiterimages/BananaStock/Getty Images. Unplasticized polyvinyl choloride, or UPVC, is a rigid and chemically resistant plastic used often in window and door frames.
Clutch size: 35-50 eggs. In April or May, the female crocodile will build a nest of loose dirt in a mound by the water's edge and lay her eggs. She buries the eggs and fiercely guards her nest. When the eggs hatch in July or early August, the female helps carry her young to the water.
Hatchling saltwater crocodiles, like the one on the left, emerge from the egg at around 25 to 30cm (1 foot) in length. They can easily sit on the lens of a camera, weighing only 70 grams (2.3 oz). However, they grow rapidly and often exceed 1 m (3.3 feet) in one to two years.