Frozen carbon dioxide gas is called dry ice. It can be used to make artificial mist for theatrical effects. Invertebrates answer - Pieris brassica is the large white butterfly, whose caterpillars are a pest of the cabbage patch. Once upon a time sextants and compasses were state of the art technology. They made navigation much easier for sailors, who had navigated by the stars previously.
Nests answer - A squirrel's nest is called a drey.
It is made of twigs and leaves, and lined with grass, though town squirrels will use paper, plastic and string to supplement the grass. Some grades of crude oil are more viscous than others. Sundew and butterwort grow in bogs in Britain. On very rare occasions a human being is born with, or develops both sets of organs. Reptiles and amphibians answer - Bufo bufo is the common toad, a native of the British Isles.