Gerris gracilicornis

Gerris gracilicornis is a species of water strider, an insect belonging to the family Gerridae. These slender, dark-colored insects are typically over 5 mm long and are often seen skating on the surface of ponds and streams.1

Water striders use their short front legs to catch insects that land on the water. Their middle and hind legs are long, with the middle pair used for propulsion and the hind pair for steering. The water-resistant hairs on their feet allow them to stay on the water's surface.1

Gerris gracilicornis exhibits antagonistic coevolution between males and females. Females have a protective shield over their genitalia, while males use vibrational signals to attract mates, which can also attract predators. This strategy is thought to encourage quicker copulation from females.1