Nightstalker Egg

The  is a miscellaneous item in Fallout: New Vegas.

Characteristics
Nightstalker eggs are found on the corpses of Nightstalkers (presumably females). When they are found, it is unusual to find more than one. They are used in the production of Mushroom Cloud (the recipe requires 1 in each set of ingredients), and in the quest Bleed Me Dry.

Locations
There are several clutches inZ-9 Crotalus DNA Preservation Lab