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Not all farms are lush pastures and fields of rolling corn. Farmland on Whitelee Moor in Northumbria is wide open moorland. Wandering across the moors Sanjida O'Connell comes across round stone constructions called stells. They were built for sheep to shelter in during the winter, but they are also great to use as bird hides. Sanjida watches LBJs - little brown jobs - a term used for birds that are similar in colour and size and difficult to identify. She tells us how to tell the difference between the stonechat and the whinchat. The whinchat is a migrant that arrives in the UK in April. The stonechat is resident all year round. The whinchat has a white stripe above the eyes, while the stonechat does not. Even the female whinchat has the white eye stripe. They are both ground nesting birds, so be careful where you tread.