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 incubation period for crocodile eggs ranges from 55 to 110 days, depending on the species and climate. The optimal temperature range for embryonic development is 87-91Âº F â¦ (31-33Âº C). Many crocodile embryos die if the temperature falls below 78Âº F (26Âº C) or rises above 95Âº F (35Âº C).