map shows the location of some of the more important pools in the area
that is often referred to as the North Tees marshes. Most of these pools
are man made or at least caused by the action of industry on what would
originally have been part of the much bigger Tees estuary. Reclamation
of the land during the last 100 years or more has resulted in low lying
land with a high water table and in some cases still affected by salt.
This makes the pools attractive to wading birds as the almost continually
muddy fringes makes some of the marshes similar to the estuary.
Click on some of the pools to see more information and pictures of the sites.