Field Studies Council Name Trail - Fresh Water Invertebrates
Product Code : SCL-CLE-12917
Name Trails guide users through a simple key to
help them to identify the plants and animals that they find. Text on the
reverse side of the charts provides further information. Splash proof and wipe
clean for outdoor use. They are small enough to take into the field as the
charts fold to B5 size (approximate size: 240 x 180mm).
Need to identify minibeasts in ponds and streams?
The Field Studies Council Freshwater name trail fold-out guide has been used by
generations of visitors to Field Study Council Field Centres.
The simple flow chart on this guide shows
representatives of the main groups found in ponds and streams. These include
animals with no legs, such as hydra, flatworms, true worms, leeches and molluscs.
Plus the animals with jointed legs, such as crustaceans, insects, spiders and
mites. Freshwater insects include those with nymphs (such as mayflies,
dragonflies and damselflies, stoneflies and water bugs) and those with larvae
(such as caddis flies, beetles, alderflies and true flies).
As well as making a simple list of minibeasts, the
Freshwater Name Trail supports many different investigations.
How do minibeasts breathe underwater?
Different animals obtain oxygen in different ways. For example, flatworms,
leeches and snails can absorb oxygen through their skin. Other animals,
like mayfly nymphs, have gills. These gills are easily to see moving on
the live animal. Mosquito larvae, water scorpions and rat-tailed maggots
use a 'snorkel'. And a few animals, like water spiders, collect air
bubbles from the surface.
How are minibeasts move through water in ponds
and streams? Some animals, like leeches, flatworms and flattened mayfly
nymphs, are streamlined. Are the animals that live in moving water shaped differently
to those that live in still water? Can you compare the deep and shallow
parts of the same pond?
How clean is the water? Since different animals tolerate different
levels of pollution, you can use the list of minibeasts you have made. The
guide features a simple biotic index
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