As the question suggests...
I've been playing a lot of Minecraft recently and have noticed a lot of Pillager patrols in the immediate area surrounding my fortress. Often these patrols pass by my fortress with no (relatively) hassle, but the sheer amount of patrols in my area is quite alarming (On average, there is about 14 patrols a day in my area).
I haven't encountered any pillager outposts in my area as yet, so that rules that out. Which leaves this question, are pillagers attracted to a specific biome?
If it helps, my fortress is built in the centre of a small desert biome, and the structure itself is of fair size.