The female usually lays 1-3 eggs. One brood. The eggs are 3" by 2" in size(7cm by 5cm) Incubate 28-40 days. Nesting 60-80 days. www.allaboutbirds.org/guide/Turkey_Vulture/lifehistory was my source. You can see adult and also hear its calls. Played it outside and ended up with 10 adults soaring overhead...Hope to update when they hatch.