If you’re reading this, you’ve probably played Pokémon Go at some point, whether it was closer to its launch this summer or earlier today because you’re still a diehard fan. Maybe you fall somewhere in the middle, though, in which case, you might not know what a “nest” is, at least as it relates to the game.

You can kind of infer what a nest is from its real-world meaning: It’s a relatively small area where a certain type of Pokémon is more likely to appear. These locations have been consistent for a good period of time, but now, Niantic has just changed their locations, meaning that new (to you) Pokémon could be in your area, just waiting for you to scoop them up for the first time (via Mic).

Sadly, for various reasons, there is no official tracking app, so officially, we’re all in the dark about what Pokémon are going to pop up where following the eighth nest migration (according to invaluable Pokémon Go resource The Silph Road). There used to be some third-party services that existed using data directly from the game, but after Niantic shut those down, all that remains are trackers that rely on user-reported sightings of Pokémon.

The good news is that there’s a vibrant community of users making these services viable, and you can totally pitch in and contribute to the greater good. Mic has a pretty thorough examination of how to get involved, so feel free to learn more here.

Featured image: The Pokémon Company