common water strider during the mating

animal april bug closeup common england entomology gerridae gerris hemiptera heteroptera hydrophilic hydrophobe hydrophobic insect invertebrate isolated lacustris lepidoptera macro mating may natural nature pond pondskater predator row season skater skeeter skimmer strider striding surface sussex swimming tension two walking water waterbug waterstrider wildlife hydrometridae hydrometra measurer