A pair of Treecreepers were showing interest in a fissure in the bark of a big Leylandii beside the path to Pollok Wood today. Other signs of potential breeding in local birds included five singing Chiffchaffs and one singing Blackcap (my first of the year), synchronised flying by a pair of Stock Doves, mating attempts by Woodpigeons and Feral Pigeons, a pair of Moorhens going in and out of some overhanging branches and several drake Mallards out on the river without their partners (the latter presumably on nests). Other notable sightings included a Raven being mobbed by Carrion Crows in trees at "Tinkers' Corner" and the pair of Goosanders back on the river (hopefully the female just having a break from egg-laying).