The stretch of coastline
between Lymington and Keyhaven is a nationally noted
site for rare domestic and migrant water birds. The
large areas of water inland from the sea wall are also
prime spots for coastal species of dragonfly, including
the Hairy Dragonfly.
As well as the lagoons there is a
balancing pond alongside the track leading from Lower Pennington to Keyhaven. Although
this pond is fenced off, the gorse track bordering it is good for resting
damselflies and the bordered section of Iley Lane usually has a fine selection
of dragonflies feeding due to the close proximity of Avon Water, a river
which rises in the bogs of the New Forest close to Holmsley.