0 When an animal burrows, it digs a hole or passage in the ground to live in. -- ryć
1 a hole or passage in the ground dug by an animal to live in -- nora
Collection involved scooping out loose soil from the burrows and sieving it as described above.
They are bare sand or rocky areas that provide little shelter from the strong sun other than burrowing underground.
Densities range widely from an average of 0.7 to over 6 burrows m-2.
Active burrows, defined by freshly excavated soil surrounding open entrances, were also counted.
I define this transition region by the perpendicular gradient of crab burrows that ranges from 0 to 1 m-2.
Fencing material was buried at least 15 cm into the soil to deter crabs burrowing beneath.
However, the eventual aim is to build a self-contained robot system that burrows through the ground to locate chemical sources.
Crab burrows within grassland sites were exposed to direct effects of sunlight.
