Ticks are not insects they are actually arachnids, related to spiders, scorpions and mites. They resemble spiders with their four pairs of legs and lack of antennae.
They are a disliked, but important, part of nature. They provide a food source for lots of animals. As carrier of many diseases they also part of the population control for many species.
Ticks do not play a pleasant part since millions of years, but an important one. Some of the ever 800 ticks species world-wide are very colorful and sometimes specific to one host species (eg Rhinos).
Have a good day.