Some species will bask or perch on chosen perches. Its posture consists of perching upright on wire fences and high perches. Copulation follows and occurs repeatedly both on the nest and on nearby perches. Chewing and destroying wood toys and perches helps to keep beaks trim. After finding a suitable place to nest, the male perches near it and calls frequently. The bird perches almost motionless for long periods waiting for prey. Suspension upgrades consisted of new springs, adjustable struts and rear perches. The Himalayan vulture perches on crags, favourite sites showing white marks from regular defecation. Screech owls hunt from perches in semi-open landscapes. Traditional Teleut dwellings included conic yurts made out of bark or perches. It seldom perches in trees, preferring more terrestrial sites to rest. Pets require plenty of toys, perches, and climbing room. Swallows are a commonly found on wires, posts and other perches. Instead, they are sit-and-wait hunters that stalk prey by hawking and diving from elevated perches. It commonly perches on the ground both during migration and on the breeding grounds.