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 mugger crocodile is the only croc species that breeds twice a year, laying a clutch of eggs 30 to 57 days apart. American alligators are the largest reptiles in North America, with males reaching up to 14.8 feet (4.5 meters) in length and 1,000 pounds (454 kilograms).