If you've ever seen small, cone-shaped pits in fine soil or sand, you've likely found an antlion trap. These pit-building insect larvae hide beneath the surface, waiting to ambush ants and other small ...

What causes those conical divots in the soft, dry soil beneath large conifers in the mountains and at the bases of cliffs on the Colorado Plateau? They presented a mystery when I first noticed them, ...

The doodlebug pit trap is an engineering marvel. The sides of the conical pit are angled so that with just a slight disturbance from an ant or other small invertebrate, part of the trap will avalanche ...