Dark And Cool
Why would the mother of the foxes put her cubs in a sewer grate if she wanted to build a shelter in a den? The experts think the mother saw this as a kind of imitation of a lair, supplying darkness and cool temperatures to her cubs.

Dark And Cool
Mistake
When she picked her den, the mother fox may have been wrong to leave her babies behind. Although the sewer was dark and cold, its resemblance to typical fox dens were not adequate for the cubs to be a good place.

Mistake