A number of rills run out from a pool in the centre of the garden.
A spiral of leaves uncoils with the slow-moving current of a dark country rill.
The highly elastic and muscular buccal rills are a specialized adaptation to this feeding mode.
Hidden in the sinuous rills of seaweed, sightless eyes, blind for centuries, stare out of the abyss.
Rills may also form when bare soil is left exposed following deforestation, or during construction activities.
If left alone, these rills may erode considerable amounts of arable soil.
Another common theme is the elaborate use of water, often in canals, ponds or rills, sometimes in fountains, less often in waterfalls of various kinds.
