Black Duck Marsh is an area of reed-beds and drier grasslands in the centre of Swanscombe Peninsula West, North Kent. Several rare and uncommon species have been found. Amongst others are nine different bees and wasps, including the brown banded carder bee (Bombus humils) and the bee wolf (Philantus triangulum), which is actually a wasp that hunts bees to feed its larvae. You may also find a rare moth - the six-belted clearwing (Bembecia ichneumoniformis) which mimics a wasp. Other notable species are the water vole and the aforementioned common lizard.
There's parking available on a layby in Manor Way at N 51° 27.438 E 000° 19.113 which has CCTV for the lorries that use it. Go over the rather bizarre steps at the side of the layby to join the footpath.
A fairly small tupperware type, snap and lock tub that contained, when placed, the following:
Compass zip pull