The Book of Insects contains a total of nineteen species of insects, and the one that struck me the most - the cicada Cicada's crypts are in the whiskers of the plants that contain the sap, and from which he can obtain the sap. He is able to climb up and down inside his burrow very easily, because when he climbs out into the daylight he has to know what the climate is like outside. So he has to work for weeks, even a month, before he makes a strong wall suitable for him to climb up and down. The cicada is also very fond of singing. The cavity behind his wings carries an instrument like a cymbal. He is not satisfied with this, but has to place a kind of rattling plate in his chest to increase the intensity of his voice. Unfortunately, the music he so enjoys is of no interest at all to others. The common cicada prefers to lay his eggs on dry, thin branches, and he chooses the smallest branches, mostly between grass and pencil in thickness. The cicada finds a suitable thin branch, and with a sharp instrument in his chest, pricks him with a row of small holes, in which his eggs are laid. The total number of eggs laid by the cicada is about three or four hundred. Four years of drudgery in the darkness, one month of pleasure in the daylight, such is the life of the cicada.