There is no clear distinction between "terrestrial", "semi-terrestrial", and "aquatic" crabs. Rather, there is a continuum of terrestriality displayed among the true crabs, although even the most land-adapted crabs must still return to water to release their eggs. Some species of terrestrial crabs can be found many kilometres from the sea, but have to complete annual migrations to the sea. For example, following the Indian Ocean monsoon, the Christmas Island red crab (Gecarcoidea natalis) migrates en masse, forming a "living carpet" of crabs. The crabs can travel up to 1.46 km (0.91 mi) in a day, and up to 4 km (2.5 mi) in total.
Terrestrial crabs have often evolved from freshwater crabs, since the physiological changes needed for living in fresh water are pre-adaptations for terrestrial living. On some oceanic islands, terrestrial crabs occupy the top of the energy pyramid.
This one is smaller compared to the common termite which is so common here. But this one is smaller about 2.cm and has black transparent wings while the common termite is white transparent wings.
A small weevil like 5 mm long insect probing on my hand with its probocis while I was in the river and followed me everywhere.