Secret Garden, Series 1 Episode 4, The Wye Valley

Hidden in a Welsh woodland at the bottom of a steep-sided valley, an old cottage is home to Robin, Laura and their two boys. The trees hide a wealth of wildlife – this is one of the most biodiverse places in Britain. But the woodland keeps its secrets close, and the family only catches glimpses of the animals that share their world. Aspect and light are important to every garden, but here the sun’s movements are more consequential than usual. For four months over winter, direct sunlight never reaches the valley floor. Many animals spend these dark, cold times hidden away. Beneath a pile of leaves, a tiny dormouse survives in deep hibernation, her heartbeat and breath barely flickering. It’s best she stay hidden – a tawny owl is on the hunt, searching for rodents drawn to the garden bird feeders. But catching mice is not the only thing on his mind. Tawny owls nest early, and this male is already courting his long-term mate. When the sun finally spills into the valley, the woodland wakes. Wild garlic pushes through cold soil, and a queen buff-tailed bumblebee emerges from a winter underground and prepares to build a new colony. Hidden in the trees, a badger mother brings her young above ground for the first time. They search for invertebrates hidden in the leaf litter, but a year-old cub wanders off alone and heads toward the garden, attracted by its abundant food. The bumblebee queen’s colony is growing fast, fed by tireless worker bees. They’re at risk of being attacked by the adventurous badger cub, but the presence of humans keeps him at bay. Down by the stream that runs beneath the house, a dipper dives through the fast-flowing water, her transparent eyelids acting like goggles as she hunts aquatic insects for her hidden brood of hungry chicks. High in a large, carefully positioned nest-box, the tawny owls are raising a family. Their owlets are growing fast – and one is already using its extra size to bully its smaller brother out of the way at mealtimes.