I don’t have to go far. There is plenty of spring in my own backyard. Birds flit from branches to bushes and back again. In our gardens, pink, orange and red blossoms wave in the gentle breeze. A movement and a fluttering noise draw my attention, and in a blur I catch sight of an unfortunate worm dangling from the side of a robin’s beak before the bird dives into a nearby evergreen. A few seconds pass and the mother darts off again in pursuit of new snacks. Cautiously, I approach the tree and crane my neck to try and spot the nest.