 The North American species "Paratettix aztecus" and "Paratettix mexicanus", for example, depend on aquatic primary production for between 80% and 100% of their diet.Riparian species are capable of swimming on the surface of the water, and readily leap into the water when alarmed Some species in the tribe Scelimenini are fully aquatic and capable of swimming underwater.The highest biodiversity of Tetrigidae is found in tropical forests.