The country was so thick that they could move only on animal tracks.

I have not even seen them disturbed by animal tracks.

All day long he had seen no animal tracks, nor any sign of human habitation.

That was obvious from the lack of animal tracks around the water.

Even animal tracks were scarce and neither of the men could read what stories they might have had to tell.

The snow on the drive hasn't been disturbed, all it shows is birds' feet and animal tracks.

At first he moved quickly along a narrow, rutted animal track.

He studied the sand for animal tracks, but found none.

Small animal tracks leading in and out of this hole, but nothing big.

Then he started ahead, moving slowly through what seemed to be no more than an animal track in the undergrowth.