The mountain maple trees in this area are known for their vibrant fall colors.

Mountain gorillas are critically endangered species.

Stoliczka's mountain voles are small rodents found in the Himalayas.

Mountain buzzards are large birds of prey found in mountainous regions.

The mountain buzzard soared high above the rocky peaks.

I tried mountain oysters for the first time at the local fair.

I tried mountain oyster for the first time at the local fair.

I found a patch of mountain bearberries while hiking in the mountains.

The mountainousness of the region makes it a popular destination for hikers and climbers.

The mountain ringlets fluttered around the flowers.