horizon cuts the sinking sun colour slow drains from winter sky by ones and twos, tens and twenties low over fields, curving round trees swirling gather, twisting, climbing as thousands, more, tens of thousands in intricate aerial ballet starlings sculpt transient beauty a function of proximity speed and distance in soaring flight form shifts with shapes fantastical ever changing, unrepeated until in the twilight gloaming the murmeration drifts to roost chattering till in darkness lost