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Read in: EnglishCymraeg
Our Welsh reserves are home to a huge variety of wildflowers, but both are nationally renowned for their Butterfly Orchid populations.
Meg Griffiths shares how and why we count the 2 types of Butterfly Orchid species at our nature reserves in Wales, and how it will protect these rare plants for the future.
We are well and truly into summer, and we’ve already witnessed a spectacular succession of wild plants flowering over the last few months. Now that we’ve waved goodbye to the anemones and hawthorn is beginning to fade, we’re welcoming the orchids.
Butterfly orchids are delicate, elegant plants, with a single floral spike bearing many pale, creamy green flowers. Each flower resembles a tiny moth (or butterfly) in flight, with its wings outstretched. They are sweetly scented and can be found growing in a diverse range of habitats, from moors and bogs to woodlands, but most commonly they are found in undisturbed grasslands and meadows.
There are two species, Greater Butterfly Orchid Platanthera chlorantha and Lesser Butterfly Orchid Platanthera bifolia. The differences between them takes an expert eye to spot, and are to do with the angle between the pollen bearing organs of the plant (the pollinia).
Both species are pollinated by moths. At night, the first signal a moth will pick up on is the fragrance of the orchid – once closer the pale flowers will stand out against the darkness.
Unfortunately, both species are experiencing dramatic declines nationally. Greater butterfly orchid is faring the better of the two but is still classed as Near Threatened in the UK. Lesser butterfly orchid has been assessed as Vulnerable on the UK Vascular Plant Red List and has disappeared from over half of its previous range in the last 50 years.
Declines across both species are because of changes in agricultural grassland management – these species need consistent management over a long time to thrive. Damaging land use change could include too much (or too little) grazing, drainage of fields, and even addition of chemical fertilisers. Orchids rely on a soil fungus to survive, and agricultural chemicals can kill off this unseen life support network.
Thankfully, as their habitats are safe and protected within our reserves, these species are still thriving. To be sure of this, every year we participate in the butterfly orchid count to monitor how our populations of these beautiful plants are faring.
This year’s butterfly orchid numbers for Plantlife’s reserve in North Wales, Caeau-Tan-y-Bwlch. This reserve is managed by the North Wales Wildlife Trust who we are so grateful to for all their hard and effective work.
This year’s butterfly orchid numbers for Plantlife’s reserve near Lampeter, Cae-Blaen-Dyffryn.
Monitoring how they are faring is an important part of understanding our reserves and making good management choices. Both our Welsh nature reserves are Sites of Special Scientific Interest (SSSI), and both list the Butterfly Orchids as a notified feature- so there is a legal duty to ensure the populations remain in good condition
We want to be able to demonstrate that the way we are managing land is benefitting them, and counting the number of orchids each year, and gathering supporting habitat information, can help us adjust our site management when we need to. This enables us to give the orchids the best possible chance they have going forwards.
Discover how you can identify the mosses where you live, and read about Lizzie's challenge to learn 10 mosses!
Grasslands like meadows and parks are not just home to wildflowers, they are also an important habitat for waxcap fungi.
Ever wondered why we need to go out and count rare plants? Meg Griffiths reflects on a summer of lichen hunting for the Natur am Byth! Project.
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