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.
The egg producing species kept commonly in captivity are members of the Pythonidae and the Colubridae groupds. All pythons lay eggs, ranging from 15 and 30 in a clutch. Most of the colubrid species lay 15 to 20 eggs in a clutch. This includes kingsnakes, milksnakes, rat snakes and corn snakes. Rough green snakes lay just four eggs. Western hog nosed snakes and the grass snake lay up to 30 eggs.