Ticks and Mosquitoes and Ticks belong to the same animal grouping as spiders - the arachnids.
Ticks have eight legs like spiders.
Ticks attach themselves only with their mouth parts and feed on blood. When they have sucked their fill, they drop off. Mosquitoes are a nuisance to humans. However, they are a tasty meal for some songbirds. She needs the blood to help her grow the eggs that she lays later on.