Dark red hind legs gathered in for a spring, and white paws kneaded the snow. She was just around the corner, her dark flame pelt pressed into the rock, her golden eye peering just slightly out of the corner at her brother. Her bright white baby teeth shone against her deep inky black maw in a mischievous smile.
His eyes went up, his nose followed. Heh, the crows were distracting him for her! Or warning him, or both, she didn't care, she waited just a moment longer...
Then "HAH!" She called out as she leaped around the corner and toward him, intending to grab his head and drag him down. Rake her claws over his neck and kick him with her feet.