 |
Estuaries provide great environments for autumn wildlife
because of their complex ecosystems. Take
to the beach for a great rock pooling and nature watching experience for all the
family. | Birds
in flight at the Dee Estuary.
Photo - Richard Smith |
Bird
watching
 Estuaries
with acres of mud are ideal feeding grounds for birds especially waders and wildfowl
such as Oystercatchers, Godwits, and Redshanks.
During the autumn the numbers
of migrant birds swell along the coast with the arrival of birds from the continent. High
tides can be brilliant for birding in the autumn - as the tide comes in, the waders
on the mudflats are pushed closer and closer towards the shoreline as they continue
to feed.
Good places for estuary birds include the Dee
Estuary (North West England and Wales), Lough
Foyle (Northern Ireland), Caerlaverock
(Scottish Borders), Swale
Estuary and Montrose
Basin (Scotland).
* Don't forget
to take binoculars or a telescope for a bird's eye view of estuarine wildfowl.
*
Check bird sightings on local bird forums and reserve websites before you leave
home. Look out for arrival dates of migrant birds during the autumn months.
*
Remember to take a bird identification guide - many wading birds can look similar
from a distance.
Rock pooling
Britain's rocky shores provides fantastic opportunities for
rock pooling and discovering animals and plants in their natural habitat.
Good
places for rock pooling include the Dee
Estuary (North West England and Wales), Helford
Estuary (Cornwall), Lindisfarne
(Northumberland), Culzean
(Ayrshire) and Wembury
(Devon). Sea shores are classified into three levels: -
the lower: uncovered during spring tides.
- the middle: uncovered and covered
daily.
- the upper: only covered by spring tides.
 Some
creatures prefer exposed shores (e.g. Barnacles and Limpets, smaller and tough
seaweeds) whilst others like sheltered shores which are often covered in mud and
silt (e.g. brown seaweeds, crabs, mussels).
Autumn
is a great season for rock poolers because the tides go out further so there is
more space at low shore where all of the good finds are to be made. Rock
pooling tips * Tides are very
important if you're thinking of going out rock pooling. Don't leave home without
checking tide times carefully. Get a copy of the tide times from the tourist office,
the 大象传媒 or Admiralty websites.
* The best time to go rock pooling is during
ultra low tides or spring tides, which occur twice every month. *
Don't forget your Wellington boots, a plastic container, a net and a good guidebook.
* Make yourself an underwater viewer using
a plastic drinks bottle. Cut it in half, put cling film over the bottom and immerse
so you can see everything clearly. * Use a
net if you're worried about putting your hands in the rock pools. *
More intrepid adults should get kitted out in wet suits and snorkelling kit. *
Zonation is important for what you see - the higher up a shore an organism lives,
the less time it's covered by sea water. Some creatures and plants are able to
survive longer out of water, and this will influence what you see and where it
is * The middle shore gets the fiercest battering
from waves so Barnacles and Limpets are well suited to survive these conditions. *Always
place marine creatures and seaweeds back where you found them and don't take them
home. Always make sure that creatures are returned the right side up.
*
Make sure a shell is empty before taking it home.
* Safety first - be careful
of the slippery rocks near the shore, check the tides and keep away from cliffs.
 Marine
life
Common rocky shore inhabitants include: *
Starfish, Sea Urchins and Brittlestars - these striking creatures are symmetrical
with arms radiating out from a central body. The Purple Henry also belongs to
the Starfish or Echinoderm family and is easily identified from its purple colour
and five arms. They feed on plants and animals
on rock surfaces and are often seen on lower shore areas.
* Sea Squirts
- these creatures are characterised by their soft bodies and can be seen attached
to rocks on lower shores. * Sea Anemones -
another soft bodied creature which can be found attached to rocks. *
Crustaceans - this group includes Lobsters, Crabs, Shrimps and Barnacles. They
are relatively common on rocky coastlines. *
Molluscs - these include Sea Slugs, Mussels and Limpets, and are characterised
by their soft bodies, although some also have hard shells. *
Bristle Worms - often seen attached to rocks or seaweed. *
Limpets - easily identified by their dome like shell which resembles a Chinese
hat. Often attached to rocks. * Shore Fishes
- look for these in rock pools and damp crevices.
Typical
plants include: * Seaweed is a type of
algae with no real roots, leaves or stems. There are three main types: -
brown: large and leathery with an olive green or brown-black colouring. Varieties
include Oarweed, Egg Wrack and Bladder Wrack. -
red: smaller and more feathery ranging in colour from pink to red-brown. Often
found in rock pools and lower shore areas. Varieties include Coral weed, Irish
Moss, Dulse and Ceramium. - green. Varieties
includes Gut Weed, Sea Lettuce and Cladophora.
Photo
credits Bird images courtesy and copyright
of Dee Estuary Birding and Richard Smith.
Limpets and Starfish images courtesy
of Natural England. | 
