Giant-faced owls (_Strix teddemanni_) are found in mountainous forests in Borneo and the Philippines. They are large, dark, long-tailed owls with huge yellow eyes and a conspicuous black-and-white facial disk. These owls are expert hunters, and they have a unique technique for catching voles that are hidden in the snow.

Giant-faced owls use their keen eyesight and hearing to locate voles that are tunneling under the snow. When they find a vole, they hover over the spot and then drop down feet-first into the snow. The owl's wings act like a net, trapping the vole. The owl then uses its powerful claws to grab the vole and bring it up to the surface.

This hunting technique is very effective, and giant-faced owls are able to catch a lot of voles in a short amount of time. In fact, these owls are so good at catching voles that they are sometimes called "vole-hawks."

Giant-faced owls are an important part of the ecosystem, and they help to keep the vole population in check. Without these owls, the vole population could grow too large and damage the forest ecosystem.

Here is a step-by-step explanation of how giant-faced owls catch voles hidden in snow:

1. The giant-faced owl uses its keen eyesight and hearing to locate a vole that is tunneling under the snow.

2. The owl hovers over the spot where the vole is hiding.

3. The owl drops down feet-first into the snow.

4. The owl's wings act like a net, trapping the vole.

5. The owl uses its powerful claws to grab the vole and bring it up to the surface.

This hunting technique is very effective, and giant-faced owls are able to catch a lot of voles in a short amount of time.