This. Is. So. Amazing.
1) Gerridae is a family of insects commonly known as water striders. These insects live on the surface of the water and are capable of skimming or skating over its surface. They even do their midnight aerobics on the water.You can find water striders in ponds, slow moving rivers, streams, or lakes with a small percentage being marine.
Signals are normally produced by vertical oscillations of the legs which remain on the water's surface. Sex discrimination is also communicated through ripple frequency. Males predominantly produce three main frequencies identified in ripple communication: 25 Hz is a repel signal. 10 Hz is a threat signal, and 3 Hz is a courtship signal.
Water striders are territorial, if a male enters the territory of another male they will be greeted with a repel signal. If the repel signal is not returned, then the male knows it is a female and will start sending out courtship signals. If the female is receptive, she will allow the male to mount her. If she is not receptive she will emit a ripple signal.