When the shelters were swapped with smaller versions that could hold just 40 cockroaches, the group would typically split into two groups of about 25, leaving one house unoccupied.

• 当这些藏身处被分割成更小的空间,每个藏身处只能容纳40个蟑螂,蟑螂团队会非常标准地分为25只的两组,会留下一间空的藏身处。