Notice how I can "see" a biter even outside radar range.
[15.2] Interacting with things in unrevealed map areas
[15.2] Interacting with things in unrevealed map areas
If you hover on things outside revealed areas with the map zoomed in you can see their stats, refer to the image for a better explanation.

Notice how I can "see" a biter even outside radar range.
Notice how I can "see" a biter even outside radar range.