There is a big fat pelican with three eggs in his bill nestling on the banks of Herdsman Lake.
You don't have to leave the mowed grass to retrieve the cache but he is well covered in grass as his bill is BRIGHT orange.
Cache contains a logbook and a pencil.
PLEASE ENSURE YOU REPLACE THE CACHE AND COVER WITH GRASS....whilst not many muggle walkers will pass this way, muggle lawn mowers frequent the area quite regularly.