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Birds migrate to find the best ecological conditions and habitats for feeding, breeding and raising their young. When conditions become unfavourable, it is time to fly to regions where conditions are better.
Most birds in colder northern countries migrate south to escape harsh winters. In temperate regions, such as the UK, about half the species migrate. For example birds that eat insects will not be able to find enough food here in winter so they fly south. While tropical birds have less need to migrate as they have a more constant food supply and conditions.
When do birds migrate?
Migratory birds generally migrate twice a year, once in autumn and again in spring. In autumn they will be flying to find a good place to spend the winter and in spring a favourable region to nest and raise their young.
PS the photo is of hundreds of winter dunlin by Portbury Wharf salt marsh.
DID YOU KNOW?
At least 4,000 species of birds migrate, that is about 40 per cent of all the world’s birds. Bird migration is a perilous business as they often have to fly hundreds or even thousands of miles.
The birds that are winging their way to Portbury Wharf in this autumn migration will be escaping the frozen north. Our winters are balmy in comparison to Iceland, Siberia and other northern latitudes!
Tomorrow, Saturday 10 October, is World Migratory Bird Day (WMBD). So this month, in celebration, we will be posting lots of stuff about migration and Portbury Wharf 's winter birds. If you have any interesting bird migration snippets you want to share please join in.
PS this photo is of a fling of dunlin. They are like shoreline starlings flocking at the tide's edge in mesmerising formations.
Portbury Wharf is a great place to visit and it is not just us human visitors that think so! It is a popular destination for our endangered winter birds too.
The autumn bird migration is one of nature's miracles. A time when shoreline birds, thrushes and more fly incredible distances across oceans and continents to escape harsh arctic winters. Some of these new arrivals will stay on the estuary edge and salt marsh as there is lots of food there. Others will prefer the pools and hedgerows on the nature reserve.
To make it through the winter they will need to feed and rest undisturbed. So we can all help by giving them plenty of space. So if we, and our dogs, keep to the main paths and don't walk across the salt marsh, they will have the best chance of survival.
This guy is a fairly regular visitor to the Reserve but i dont normally get the chance to video him at such close quarters.https://youtu.be/pHBAqWOf6y0
Well more of our wintering friends are returning and today a snipe was making his presence felt on the south pool
Join the call for a better future!
Sign the petition to #ReviveOurWorld
e-activist.com
Nature is in crisis and we need Government action. I’ve signed the petition for legally-binding targets to #ReviveOurWorld. Will you? Sign and Share... e-activist.com/page/67273/data/1?ea.tracking.id=facebook-sharenice to see some old friends back - 3 shovellers still in the summer plumage and 4 gadwall mid moult from summer to winter coats. Both on the south pool
they are like buses - get one sandpiper and more appear. There were 2 green sandpipers on the south pool yesterday and they flew up to the North where they joined 3 common sandpipers. This video is of the green
Portbury Wharf Plants
Wild Flowers, Plants and Trees
Portbury Wharf plants can be stunningly beautiful. They are also vital to the ecosystem being an important source of food and shelter for all sorts of wildlife.
At Portbury Wharf wild flowers grow around the ponds and along the banks of the rhynes and there is a flower meadow in the Sanctuary. As it is a predominantly wetland habitat, plants that prefer this sort of environment thrive here. Though don’t overlook the hedgerows which are home to many pollen and berry producing trees and plants. Where you see flowers and berries you may also see wildlife, so look closely.
This is just the beginning of a list of Portbury Wharf Plants. So we will keep adding to this page to build up a comprehensive list of the plants here.Page updated 4 October 2019
Berries Nov-Apr
Ivy (Hedera Helix) an evergreen ecosystem
This is a very important plant for wildlife providing shelter and food in autumn and winter!
Ivy is so important it has its own page . . .read more
Ox-eye Daisy (Leucanthemum vulgare)
Ox-eye daisy or Moon Daisy is a familiar and attractive grassland perennial. It grows up to 60 cm and has large white flowers from June. It is our largest native member of the daisy family and thought to be the origin of the children’s petal-pulling game “loves me, loves me not”.
A mature plant can produce up to 26,000 seeds which can remain viable for many years. So it has the ability to spread relatively easily and as a result is considered invasive in more than 40 countries.
Reference and further reading: https://en.wikipedia.org/wiki/Leucanthemum_vulgare
Dog Rose (Rosa canina)
Look out for the bright red rose hips in the autumn hedgerows. They are the seed pods of the wild Dog-rose. It has sweetly scented pink or white flowers that appear in June and July with rose hips ripening in autumn.
Reference and further reading: https://en.wikipedia.org/wiki/Rosa_canina
Yarrow (Achillea millefolium)
Height 20cm to 1m. Flowers have strong sweet scent. Food source for many beneficial insects. Attracts predatory insects such as ladybirds and hover flies which eat pests, so used as a companion plant. Birds such as starlings line their nests with yarrow. So all in all a great plant for wildlife.
Reference and further reading https://en.wikipedia.org/wiki/Achillea_millefolium