A trail of fresh blood on leaves led a few yards into the thick undergrowth.

In thick undergrowth, not even a leopard can avoid making some noise.

They began to run, pounding through the thick undergrowth, trying to find their way in the darkness.

Then, having rested for some minutes, he eased his way up into thick undergrowth.

What with the thick undergrowth, you couldn't see much.

He saw only eight or nine, but noises in the thick undergrowth suggested at least as many more.

Something heard them and crashed away through the thick undergrowth.

The trees were growing closer together now, with thicker undergrowth.

She fell into the thick undergrowth, vanishing from his sight.

The three of them got very wet going home through the thick undergrowth.