They have been flying in wide circles over the meadows and hunting together, part of the mating ritual. There haven't been any altercations with the crows thusfar.
Red-tailed hawks have been nesting in the tall trees of the back woods for years creating a large stick nest. According to Lives of North American Birds by K. Kaufman, they have 2-3 eggs and incubation is done by both parents and lasts 28-52 days. The female stays with the young until they are 6-7 weeks old and during this time the male provides the food. I look forward to hearing the squawking of the babies later this spring.