Elizabeth Hand’s short story The Bacchae takes place in a near-future world of sky-shields and mutant fish, awakening to dark-red, cultic magics:
A shadow sped across the ground. For an instant it blotted out the sun and Gordon looked up, startled. He had an impression of something immense, immense and dark and moving very quickly through the bright clear air. He recalled his night-time thoughts, had a delirious flash of insight: it was one of the shields torn loose, a ragged gonfalon of Science’s floundering army. The little girl shrieked, not in fear but pure excitement. Gordon stood, ready to run for help; saw the woman, the children’s mother, standing opposite him pointing at the grass and shouting something. Beside her the two children watched motionless, the little girl clutching a heel of bread.
In the midst of the feeding pigeons a great bird had landed, mahogany wings beating the air as its brazen feathers flashed and it stabbed, snakelike, at the smaller fowl. Its head was perfectly white, the beak curved and as long as Gordon’s hand. Again and again that beak gleamed as it struck ferociously, sending up a cloud of feathers gray and pink and brown as the other birds scattered, wings beating feebly as they tried to escape. As Gordon watched, blood pied the snowy feathers of the eagle’s neck and breast until it was dappled white and red, then a deeper russet. Finally, it glowed deep crimson. Still it would not stop its killing. And it seemed the pigeons could not flee, only fill the air with more urgent twittering and, gradually, silence. No matter how their wings flailed it was as though they were stuck in bird-lime, or one of those fine nets used to protect winter shrubs.
Suddenly the eagle halted, raised its wings protectively over the limp and thrashing forms about its feet. Gordon felt his throat constrict. He had jammed his hands in his pockets and now closed them about the chestnuts there, as though to use them as weapons. Across the grass the woman stood very still. The wind lifted her hair across her face like a banner. She did not brush it away, only stared through it to where the eagle waited, not eating, not moving, its baleful golden eye gazing down at the fluttering ruin of feather and bone.
As her mother stared the little girl broke away, ran to the edge of the ruddy circle where the eagle stood. It had lifted one clawed foot, thick with feathers, and shook it. The girl stopped and gazed at the sanguine bird. Carelessly she tossed away her heel of bread, wiped her hand and bent to pluck a bloodied feather from the ground. She stared at it, marveling, then pensively touched it to her face and hand. It left a rosy smear across one cheek and wrist and she laughed in delight. She glanced around, first at her mother and brother, then at Gordon.
The eyes she turned to him were ice-blue, wondering but fearless; and absolutely, ruthlessly indifferent.