General descriptions:
* A tightly-knit family: Emphasizing their social structure and familial bonds.
* A symphony of howls: Highlighting their vocal communication.
* A shadow moving through the night: Evoking their stealth and power.
* A formidable force in the wild: Describing their collective strength and hunting prowess.
* A living embodiment of the wilderness: Highlighting their connection to nature and their role in the ecosystem.
More evocative descriptions:
* A swirling vortex of fur and teeth: Creating a sense of chaos and danger.
* A silver current flowing through the forest: Conveying their grace and fluidity.
* The eyes of the night watching: Emphasizing their keen senses and watchful nature.
* The heart of the wild beating strong: Describing their powerful instinct and untamed spirit.
* A tapestry of grey and white, woven with shadows: Highlighting their visual beauty and mystery.
You can also use sensory details:
* The scent of musk and damp earth hangs heavy in the air as the pack passes.
* The sound of their paws padding on the forest floor, a soft, rhythmic beat.
* Their piercing green eyes glint in the moonlight, watching, waiting.
Ultimately, the best way to describe a pack of wolves depends on the specific context and the effect you want to create.