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Surveys
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Activity 1 - Lichens on trees
Activity 2 - Tar spot of sycamore
Lichen guide
Usnea
Evernia
Hypogymnia
Melanelixia
Flavoparmelia
Parmelia
Leafy Xanthoria
Cushion Xanthoria
Physcia
Results so far
Lichens on trees
Lichen distribution map
Lichen distribution charts
Lichen diversity score map
Pollution scores
Pollution score map
Tar spot of sycamore
Tar spot distribution
What have we discovered?
National pollution data
Biodiversity survey
Finding a hedge
Enter your results
Results so far
Main results map
What does your hedge award mean?
Hedge conservation
Hedges: fact and folklore
Prize draw
Terms and conditions
Useful links and resources
Soil and earthworm
Take part
Earthworm guide
Black-headed worm
Blue-grey worm
Brandling worm
Chestnut worm
Compost worm
Green worm
Grey worm
Immature earthworms
Less common earthworms
Little tree worm
Lob worm
Octagonal-tailed worm
Redhead worm
Rosy-tipped worm
Results so far
Survey results map
Earthworm distribution map
Soil and site analysis
Your earthworm pictures
Support for groups
Earthworm Society of Britain
Water survey
Take part
Find a lake or pond
Enter your results
Results so far
Main results map
Interactive invertebrate graph
Invertebrate distribution map
Photo map
Pond health score map
Water clarity map
Links and resources
Opalometer awards
Discover and protect freshwater wildlife
Identification
Explore Nature
Bioblitzes
How OPAL can help your society
OPAL Grants Scheme
Funded societies 2009
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Tachinid Recording Scheme
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