Timberjack. This gigantic creature has razor-sharp wings that can slice through full-grown trees.

8 seconds sound clip from the How to Train Your Dragon movie soundboard.

You can hear this line at 00:23:34 in the Blu-ray version of the movie.

Quote context

[...]

- So, OK, I'll see you... tomorrow.

- Dragon classifications. Strike class. Fear class. Mystery class.

- Thunderdrum. This reclusive dragon inhabits sea caves and dark tide pools.

- When startled, the Thunderdrum produces a concussive sound that can kill a man at close range.

- Extremely dangerous. Kill on sight.

- Timberjack. This gigantic creature has razor-sharp wings that can slice through full-grown trees.

- Extremely dangerous. Kill on sight. (2)

- Scauldron. Sprays scalding water at its victim.

- Extremely dangerous.

- Changewing. Even newly hatched dragons can spray acid. Kill on sight.

[...]