On the osprey nest, all looks calm at first. The male is doing some housekeeping and the female is sitting on the nest. But there's an intruder flying right over the top of the nest. As soon as he spots it, the male immediately takes off to gain height, while the female stays close to the nest, going into a frenzied display and calling loudly to proclaim her right to the nest. The pair have been together for seven years and have raised 18 chicks together - their solidarity is a force to be reckoned with when intruders enter their territory looking to establish a new nest on existing sites. The male dive bombs the invader. Then a buzzard also swings by, a danger to the young chicks. The female now flies off the nest and dive bombs him, seeing him off.