Nests are what Dots need to successfully breed. Keepers can collect Nest parts while foraging in range of a Habitat. Nests will be automatically crafted once you collect enough Nest Parts. There are many types of Nests and each can yield a different Archetype of Peridot.  

To view your Nest Parts and completed Nests, tap on your Backpack and select “Nests”. The number on the left indicates how many of each type of Nest you have, and the tally on the right lists how many parts of a whole Nest you have collected.