The radar works on unclaimed babies, use it to keep you in check when chitin/poly/hide/Tek creature farms are ready to harvest and to check for newborns when breeding for bosses or just extra stats, thus, allowing you to not need to baby sit the eggs so you don't miss imprints and feeding, you can just take care of your base and go see the newborn once the parasaur warns you.

Tip by Vinícius. Hope i helped you with this use of the parasaur, i use this and can confirm the uselfulness. If you liked the tip, you know what to do.