There are two families of ticks, hard and soft. All ticks are blood sucking parasites of vertebrates, like birds, reptiles and mammals, including humans.
The hard tick Ixodes ricinus, vector of Borrelia, TBE, Ehrlichia and lots of other diseases, is most abundant in the tempered parts of the world. The infections transmits from the host blood to the tick, but can also transmit between male and female and the different stages of tick development.

During its life cycle, the tick undergoes different stages of development. After hatching from the egg, the larvae further moults to a nymph and finally ends as adult. During each stage a blood meal is required.

We know around 850 species spread over the tempered zones round the world. Ticks has been on earth for billions of years. They like warm areas with high humidity. Normally they sit at the tip of a grass straw, waving its claw supplied front legs in search for a passing host.

The tick (I.ricinus) has no eyes and uses its sensory organs to detect carbon oxide, butyric acid as well as movements in the vegetation by an approaching victim