In spring, he feeds on insects. In autumn and winter his diet is reed seeds and grit in this feeding tray is an aid to digestion. The RSPB entice the birds out of the reeds for us to admire.
I came to Leighton Moss hoping for fieldfare and redwing, having found them on Scout Scar the previous day. But could find none. The surprise was this large flock of coot, following their leader, settling on the island, unsettling and off in a whoosh and vanished. You can predict according to the season, so far. But what you see and what you don't is often about coincidence. We came upon the bearded tits at an opportune moment, might have waited about for hours and seen nothing.
Listen to Vivaldi's The Four Seasons and the music suggests each season is distinct. Nature isn't like that. One season flows into another. Take alder trees, for instance. The dark and brittle cones are the fruit formed during last summer and they linger through the winter. Before the summer is over you'll find catkins forming in readiness to overwinter, for next spring. Catkins appear on birch too. I like the delicacy of birch and its contrast with the dense mass of alder cones and catkins. Both alder and birch assume a purplish tinge in winter.