But it's diluted with sky, not water,
the aerial plankton on which they sup.
Our solitary pipistrelle flickers
over her chosen suburban quarter,
echo-locating, to siphon it up.
It nourishes birds as well as bats -
high-flyers that feed on the wing,
swifts, house-martins - this floating gruel
of hymenoptera, midges and gnats,