The two stages on tick that bite humans are the nymph,and adult,the nymph is very small about seasame seed maybe a tad smaller,and mid brown colour(in talking deer tick here) and hard to spot, i either use pale trousers when walking to my fav camp spot through the ferns and regularly check my self and have been lucky to find the in time,or the adult black legged deer tick easy to spot about size of a grain of rice,though slightly fatter,red body black legs, if im not wearing pale trousers,i use a dutch coverall covered in permethrin, once down through the ferns and on the beach off it comes with normal clothes underneath,its worked well keeping them at bay,alot of deer's here that use the cliff ferns for bedding down,so alot of ticks.