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 control their body temperature by basking in the sun, or moving to areas with warmer or cooler air or water temperatures. A basking crocodile may be surprised by an approaching person and quickly (and noisily) enter the water. This behavior might startle the person, but it should not be misunderstood.