Back in March RWF member Sue Patchett spotted a large plastic container, probably a water bowser, in the river above Low Bridge and suggested that we should try to remove it. Somehow we never got round to it. A couple of weeks ago it was spotted it in the river below Low Mill Bridge and we thought we should do something. Unfortunately access to the river is very difficult there and we were planning on getting a better look at it then the rains came last week and the container is now in the River Aire at Riddlesden. So we we rather regret that we missed our opportunity to remove it and it will make it’s way eventually to the sea and add the millions of tons of plastic debris that will wash around in our oceans for thousands of years.
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So how did it get into the river in the first place? We hope it was not dumped intentionally, more likely it accidentally fell or was blown into the river from an adjacent businesses yard. We have noticed this happening at various places along the river and have worked with some responsible businesses to prevent debris entering the river. For instance we found large sheets of plastic coated cardboard in the river upstream from the bypass bridge, they had blown in from an adjacent yard, Harrisons Bathrooms. We cleared the cardboard and spoke to the yard manager who agreed to increase the weighing down of  the sheets. Fortunately Harrisons is a good, well organised and responsible yard so the sheets were probably just a one off. 
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​Other yards are not so responsible, we notice debris down the bank from another yard above Low Bridge, it is possible the large container also can form there. There is also debris down the bank of North Beck at Postman’s Walk, RWF and BCMBC will be working with the yard owners to clear this  next month.

​We would ask businesses along the Worth to take pride in the beautiful natural resource on their doorstep and take precautions to ensure debris cannot get into the river. If by accident stuff does get into the water, please take steps to remove it, don’t just let it go. If anyone sees debris in the river please report it to us and we will endeavour to to have it removed.
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Given this reputation, Green Recovery Challenge Funding has been awarded to Aire Rivers Trust to carry out habitat improvement work on the site. Using money from the Department for Environment, Food and Rural Affairs (DEFRA) via the National Lottery Heritage Fund we will be working with the City of Bradford Metropolitan District Council and The River Worth Friends and other local community groups, aiming to enhance the area both as a leisure amenity and wildlife haven. 
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​Indeed, we are looking to work with as many local organisations as possible throughout the project, hoping to co-ordinate their activities with River Worth Friends, which the Aire Rivers Trust works in long term partnership with. The intention being to bring real long term improvements to the the North Beck and Postman’s Walk area. If you or your organisation are interested in becoming involved with the site, please contact the project officer: Sam Riley-Gunn [email protected] Tel. ​01274 061902

We have mentioned lampreys a couple of times in blogs and facebook postings recently, we we though some might be thinking WTF is a lamprey, so here’s a bit more information about them.

​The sea and river varieties are carnivorous, having the unpleasant habit of attaching themselves to fish with their sucker mouth and boring into the body to eat the blood and flesh, ugh! On the Worth you will be pleased to know that we just have the brook lamprey which is not so disgusting as it feeds by filtering organisms out of the water, in fact it doesn’t eat at all in the adult stage.

How do they live?
Lampreys have two stages, a larval stage and an adult stage. After hatching the larvae drift down stream until they come to a suitable sandy/silty river bottom which they burrow into. They will remain there for five to six years feeding by filtering organisms from the water around the mouth of their burrow. They grow from 3-5mm to 12-15cm before changing into the adult form.

​One of the problems lampreys face on the river (as well as the herons!) is the number of weirs. These act as a barrier to migration and may be limiting the population, mind you this also applies to other fish such as trout and grayling. River Worth Friends are keen to have some of these weirs removed if possible.

​​On Monday, as part of our survey of the river Worth and it’s tributaries, we were out kick sampling. This is a way of finding out what invertebrates (bugs) are living in a river.

Most river flies live as flies for only a short period, sometimes for only a day. However they may live as bugs in the river for over a year before hatching into flies. We want to know more about bugs in the river for two reasons. Firstly a healthy bug population should lead to a healthy population of their predators like Dippers, Wagtails and Trout. Secondly the bugs are a very good indicator of the quality of the river water, they are very sensitive to pollution so lots of bugs means clean water.
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The invertebrate pictured at the top of the blog is a Stonefly nymph from North Beck. We had trouble identifying it because it is a much larger species then we usually get, we have not seen one this size before (about 25mm).
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Sampling in this way is a great way to learn more about rivers and their ecology. It's also a return to childhood and messing about in the water! If you or your kids would like to get involved in this project please contact us.
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This week's blog is by written and photographed by RWF member John Tickner (all images are copyright to him).
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 ​The daffodil, today one of the most familiar of garden and roadside verge plants, was once as common in the wild. However, many that we see nowadays are either planted or escaped garden varieties. The wild daffodil has narrow, grey-green leaves and a familiar daffodil flower, but with pale yellow petals surrounding a darker yellow trumpet; this two-tone look is a starter to tell them apart from their garden relatives. The wild daffodil is also relatively short and forms clumps, carpeting the ground.
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​From one extreme to the other, it is only too easy to pass the tiny common wall cress without noticing. It’s the lichens and mosses that colonise a wall first, they then trap particles of dirt that allow slightly larger plants to get a foothold and move in with them.

​My final offering is the ever popular primrose. A familiar spring plant of woods, hedge banks and grassy places, it is sadly less abundant than it used to be possibly as a result of over-picking.
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​Which leads me to an appeal to please enjoy our wild flowers where they are, please leave them both for others to enjoy and to give them a chance to multiply and thrive. If you spot any unusual flowers while walking our river, or indeed see a particularly special show put on by one of the more common varieties, RWF would be pleased to hear from you as we try to grow our knowledge of our river and wildlife.

Images courtesy of RWF member John Tickner.

​Recently we have been concentrating on clearing litter at river level. This has involved two of our members working in the river with waders on, one on either bank, so they are socially distanced. In this way they can clear litter and debris that is hanging in the riverside vegetation, mainly on brambles which are excellent litter filters. More members  have been working higher up the bank.

We would estimate that about 40% of the litter we have collected in this way is wet wipes and other sanitary fabric (nappies and sanitary towels). This is not thrown directly into the river but is released when surplus sewage is discharged into the river during heavy rainfall, known as combined sewage outflow. Hopefully these photographs show the problem. River Worth Friends asks everyone to avoid putting these fabrics down the toilet, put it in the bin instead.

A plastic water bottle dropped here in Keighley might stay in Keighley but it could equally end up littering a beach in Spain or the Caribbean for instance. Or even worse ingested by a marine creature.

​We have probably covered about 100 yards of the river in the last few weeks, working our way up from the confluence with the Aire, we've removed about 40 bags of litter plus numerous car tyres, shopping trolleys, various garments and duvets, domestic appliances, etc.

If you would like to help us in this work please get in touch using our contact form, we would be glad to have you.
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​Over the next few months you may notice more anglers on the river, that's because the trout fishing season starts today. 

The closed season in Yorkshire started on 1st October so fly fishing fans have been itching to get out on the water for a few weeks now. Last year there was great disappointment when the opening of the season coincided with the first lockdown, we were not able to get put fishing until May, it was hell! Closed seasons are there to give the fish a rest during spawning, which for our trout happens in the winter. Hopefully they will now have recovered from spawning and be able to withstand some fishing pressure.

Often people are surprised when I tell them that the River Worth has a good population of brown trout, there is actually a good head of fish from the confluence with the Aire right up to the waters above Haworth, I have also seen fish in North Beck up around Goose eye. There are also Grayling in the lower reaches, I have caught them up as far as Dalton Mill. Grayling are in the salmonid family (with trout and salmon), their spawning season is in the spring so the closed season for them is from March 16th to June 14th (the same as course fish such as roach, perch and pike). It can be complicated trying to catch trout but not grayling!

A fish population is only as good as the food available to it. The primary food of trout and grayling are the bugs that live on the river bottom. Most river flies, which usually hatch and die within a couple of days will have spent a year or more as larvae in the river, the fish eat these larvae and also take the flies when floating on the water on hatching. The bugs are very sensitive to pollution, in fact a decline in bug population can be a first indicator of a pollution problem. So the healthy fish population has only come about because of the vast improvement in river quality since the 70's which has increased the bug population to feed the fish.

The trout usually take a while to get going at the beginning of the season so fishing can be challenging early on, but by May they are much more  active and good sport can be had. I fish catch and release and try to get the fish back in the water with as little handling as possible. I will certainly be down at the river in the next few weeks, if you see me give me a wave.