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.
Crocodiles wait for the right moment to strike on a prey and thus they are often called sit-and-wait predators. They remain in the water motionless while focusing on the prey almost all the time. What Do Crocodiles Eat. While lions rule the land in Africa crocodiles are at the top of its food chain in water. They often make their presence feel to marine animals no matter how large they might become. Its amazing ability to chase down animals on land makes it even more fearsome to many wild animals.