This issue should be resolved with patch 0.2.0. If you continue to experience this issue, please reach out to us through our support site to let us know.
Players are reporting that they are unable to find ant eggs inside the ant hill. This could potentially be caused by the issue with some creatures spawning in or under terrain.
Some players have mentioned that killing most of the ants and camping outside the ant hill while waiting several days triggered the ants to start laying eggs to help the low population.