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Species which are particularly characteristic of ancient woodland sites are called ancient woodland indicator species, such as bluebells, ramsons, wood anemone, yellow archangel and primrose for example, representing a type of ecological indicator. [8] Anemonoides nemorosa, the wood anemone
Very rare species are not considered axiophytes; for a species to be a useful indicator of quality habitat it must be relatively frequent in those habitats, but scarce elsewhere. A typical example would be dog's mercury (Mercurialis perennis), a plant slow to colonise new sites, but common in ancient woodland and old hedgerows.
The plant is an ancient woodland indicator, as the ants rarely carry the seeds more than a few yards, seldom crossing a field to go to a new woodland. The Latin specific epithet pratense means "of meadows". [2] Melampyrum pratense is a food plant of the caterpillars of the heath fritillary (Melitaea athalia), a butterfly. [3]
Old growth forests and "ancient woodlands" — of varying species, habitats and climates around the world. See also: List of old growth forests . Wikimedia Commons has media related to Primeval forests .
Presence of the wild service tree is commonly taken as an indicator of ancient woodland. 71 different species of bird have been recorded, alongside foxes, grey squirrels, bat species including pipistrelle, Natterer's bat, common noctule and the rare Leisler's bat, 180 species of moth, 12 species of butterfly and 80 species of spider.
Examples of plant formation include forests, woodlands, and grasslands. Because it may not be possible to determine whether a particular plant was an oak, eucalyptus, or other species, plant formations in paleosols make it possible to identify an ancient woodland ecosystem from an ancient grassland ecosystem.
A bluebell wood is a woodland that in springtime has a carpet of flowering bluebells (Hyacinthoides non-scripta) underneath a newly forming leaf canopy. The thicker the summer canopy, the more the competitive ground-cover is suppressed, encouraging a dense carpet of bluebells, whose leaves mature and die down by early summer.
There is also an extraordinary range of geophytes, the plants that have bulbs or bulbous growths that make them especially adapted to woodland. These include the ancient woodland indicators of lily-of-the-valley, herb paris and ramsons, but also the uncommon in angular Solomon'-seal (Polygonatum odoratum) as well as the common in bluebells ...