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.
Believe it or not, the sex of baby crocodiles is determined by the temperature of the eggs in the nest. Believe it or not, the sex of baby crocodiles is determined by the temperature of the eggs when they were in the nest -- it's called temperature dependent sex determination. Temperature dependent sex determination or what is also known as TSD is a phenomenon that has been studied in a number of reptilian species.