All of our past newsletters are archived here. We're aware that some of the links within them don't work in the archived versions and we're working to correct that. If you haven't yet subscribed to our monthly newsletters, you can do so here.
All of our past newsletters are archived here. We're aware that some of the links within them don't work in the archived versions and we're working to correct that. If you haven't yet subscribed to our monthly newsletters, you can do so here.
For every classification you do on the County Durham Survey project between Mon 12/11/2018 17:00 and Mon 26/11/2018 17:00, you’ll get one ‘ticket’ in a prize draw to win either a £100 Amazon voucher, or one of two £50 Amazon vouchers! The more classifications you do during this time, the more chance you’ll have to win a prize!
You can read more information about the project over on our Projects page. To start classifying, simply log in as a MammalWeb spotter, and select "County Durham Survey" from the dropdown "Select a project box".
We've got a diverse array of new spotting opportunities for you to enjoy! Should be something for everyone - so thanks in advance for anything you can do to help uncover what's out there! Here are our new spotting opportunities:
1). PhD student Sammy has started to upload her daunting (half a million!) set of pics from this summer's survey of County Durham. You can read more about the project on the Projects page. To help classify the photos select 'County Durham Survey' from the dropdown box when spotting.
2). For something truly different, check out long-term MammalWeb contributor Roland's new project. How well do you know the small mammals of Britain? Time to find out! Read more about the project on our Projects page, and select 'Small Mammal Camera Trapping' when spotting to help classify some images!
Over recent months, we've had several news articles about new projects available via the MammalWeb site. With huge thanks to Helen, who's been developing them, the project listings pages are now available.
If you click on "More" under any project, you will find a short description of each project and an indication of progress with uploading and classifying its image sequences. The summary charts draw on what is becoming a very large data base and, as a result, they currently take a little while to appear. Those will be optimised in due course to speed them up. We also plan to make it possible to link straight through to classifying sequences for any specific project. Private projects are not listed on these pages but some projects that are currently private will soon be made available for public viewing.
Summary charts for a project are based on submitted classifications (rather than on strictly validated data) but should, in any case, give a reasonable sense of the relative numbers of image sequences in which different species appear. They certainly suggest striking differences between the species most commonly photographed in a range of settings (including predominantly urban, entirely rural, arboreal, or with the assistance of baiting).
Notice that the "progress bars" (as depicted in the image above) identify the proportion of image sequences that have been classified at least once. In reality, we often need more than one classification to develop a reasonable sense of what's in a sequence (see further here). Consequently, if the progress bar suggests that 100% of the project's sequences have been classified but pictures are still available for you to classify, please keep spotting!
I would say, "We've all done it!" - but it's probably mostly just me. Yes, once again I'm howling in anguish because I forgot that my camera trap uses a US time format (MM-DD-YYYY), rather than the more familiar (to me at least) DD-MM-YYYY format. That means that photos from a camera trap I put out in early July, are all proudly stamped with the claim that they were taken at various times after the 7th of May! If I was cataloguing and analysing my own camera trap photos, I'd have work-arounds for this error. However, because MammalWeb takes information directly from the image EXIF data (Exchangeable image file format data, for those of you who care), I can't upload the images until I've sorted out the dodgy "Photo taken" dates and times. This problem has been hanging over me for a while but, today, I decided to look into a solution. Happily, I found one!
The software allows you to choose the source folder containing the files you want to correct, as well as the output folder in which you want to store the corrected files. That's particularly useful if - like me - it takes you a while to work out the difference between two dates (so you don't want to overwrite the originals until you've checked that you're correct). There are a variety of options for changing the dates and times - but the most straightforward is just to set the numbers of days, hours, minutes and seconds by which you were out when you set the camera. One thing to check is the "options" tab, which might suggest renaming the images. You can easily change that, if you'd prefer that it left the names unchanged. Of course, if you have a camera trap that puts the date and time on each photo, that will still be in error - but at least the dates and times recorded in the database will be correct!
Well, I'm pleased to have found this simple solution - and I hope that some of you find it useful too.
Many of you will have been pleased to see the news, a couple of weeks ago, that pine marten appear to be spreading into Northumberland (e.g., see this article in The Guardian). The recovery of pine marten in England is an exciting development for nature enthusiasts, and could help to alleviate pressure on our native red squirrels.
We're really excited to announce a new partnership with NatureSpy, a non-profit organisation that - like MammalWeb - aims to engage people with the wildlife around them, and to research and conserve wildlife and habitats through study and monitoring. NatureSpy run a variety of projects and, at present, they are organising an intensive, 3-year project to study pine marten in the North York Moors. With the aid of volunteers, they are currently rotating camera traps around a variety of sites in the North York Moors, and a proportion of those traps are set to record still images. The traps yield large numbers of images and those will help to inform NatureSpy about the ecology of the area, aiding the development of a long-term conservation plan for pine marten in the area. If we're lucky, we might even see a picture or two of a pine marten!
If you are registered as a Spotter, the NatureSpy images will be available to classify by selecting "Classify All" from your Spotter home screen. To focus your efforts on helping the NatureSpy team, you can select "NatureSpy - North York Moors" and choose "Classify Selected Project Only".
You can also read a post about this project on the NatureSpy blog, here.
Much of the monitoring conducted by NatureSpy (as well as many other individuals and organisations) uses video, rather than still images. We know that a capacity to handle video (rather than just image sequences) is an aspect of the platform that many of you would like to see us develop. Over coming months, we will be looking for ways to resource this (both the development and the subsequent hosting of large video files); we'll keep you posted regarding progress!
Toby Atkinson-Coyle recently graduated from the biology department at Durham University: congratulations Toby! For his final year project, Toby worked with the MammalWeb team on a camera trapping project looking at the impact of urbanisation on mammals in Durham. Here, he writes about some of the findings from his project:
For my masters’ project, I used distance sampling with camera traps to assess the impact of urbanisation on mammals in Durham, UK. As discussed in previous posts, this method involves measuring the distance of animals from the camera which can then be used to calculate their density. I deployed cameras in both rural and urban habitats across a 3x4km area of Durham from 12th February through to 9th March 2018.
Over the study period, a total of 2,646 images of wild mammals were obtained, 1,285 in rural and 1,361 in urban habitats (see Figure 1). Six species were regularly detected in both habitats, including European rabbit, European badger, red fox, grey squirrel, roe deer and small rodents. European rabbit and grey squirrel were the most frequently photographed species, so I report on them in greater detail. To assess the overall impact of urbanisation on mammals, I was also able to calculate broader community-level metrics such as species richness.
Figure 1 A subset of mammals photographed in Durham, UK.
Species varied in density between habitats. Four out of the six detected mammal species decreased from rural to urban habitats whilst two increased. The largest differences in density were in rabbit and grey squirrel populations. Rabbit density in urban habitats was twice that in rural ones (see Figure 2A). Conversely, squirrel density was much greater in rural habitats (see Figure 2B).
Figure 2 Estimated density per km2 of European rabbit and grey squirrel populations in rural and urban habitats.
I calculated species richness per deployment by counting the number of different species detected by each camera. Species richness was higher in rural habitats with an average of 1.60 (0.29 SE) species detected per deployment whilst in urban only 1.12 (0.23 SE) species were detected (see Figure 3).
Figure 3 Species richness per deployment of mammals in rural and urban habitats.
Urbanisation has a range of impacts on mammals at both the species and community levels. Broader ecological metrics indicate an overall decline of mammals with urbanisation but, at the species level, some appeared to benefit. Therefore, it is important to consider a range of species and community-level metrics when assessing the response of wildlife to disturbance.
We (the project team, plus all of our participating volunteers) have published our first paper based on MammalWeb! The paper is in the journal Remote Sensing in Ecology and Conservation, and can be found here. When we think of Remote Sensing, we often think of satellite observations (a source of data that can be remarkably handy for ecologists, as well as many land managers, plus other scientists and social scientists). However, Remote Sensing can cover many types of data collection for which the presence of people is not necessary at the time of data acquisition. Camera trapping is, thus, a good example of a remote sensing approach.
A pre-requisite for making use of the data collected by all of MammalWeb's participants is knowing what's in the images. By comparing user-submitted classifications to a set of over 10,000 image sequences that have been looked at by "experts" to determine their subjects, we can learn about how confident we can be about those classifications. Happily, it turns out that participants are very good at identifying what's in an image sequence. We need lots of examples to get a good idea of how accurate participants usually are, so we focused on 16 of the most commonly-occurring species (or species designations). When those species occurred in a sequence, we looked at all the submitted classifications and asked how many of them correctly said that the species was pictured. For almost all of the commonly-occurring species, that figure was 80% or more. For several species, it was closer to 95%! Given the risk, with all trail cameras, of getting blurry, dark, partial, or otherwise indistinct images, we think this is a real testament to the skill and dedication of those using the website!
Fig. 1. In general, spotters show high levels of accuracy.
Two "species" for which accuracy is notably lower are small rodents and brown hares. Further analyses looking at the inaccurate classifications in those cases show that they arise for different reasons. In particular, small rodents are often overlooked altogether, because they are often visible only from their eye-shine. We hope that our site developments (especially the new approach to being able to move backwards and forwards through a sequence, which can help to identify any sort of movement) will reduce this problem. By contrast, brown hares show lower accuracy than most other species because they are often misidentified as rabbits. This is understandable, given their many similarities. However, we would encourage anyone who is uncertain to take a look at web tutorials, such as this page or this one.
Fig. 2. Reasons for incorrect classifications by species or species group. Where blue predominates, the species is more often missed than misclassified; green indicates the proportion of errors that arise from misclassification.
Clearly, based on these numbers alone, we can be much more confident of classifications regarding some species than others. This might mean that we could remove many image sequences, allowing users to focus on the less distinct, the more unusual, or those that prove harder to reach consensus about. However, that might result in a far less rewarding time for Spotters. At present, we are keeping a close eye on techniques for automatic image analysis. These might, at the very least, allow us to remove sequences very likely to contain no wildlife, which - based on comments received - would probably be very popular with many of our contributors!
Many of you have asked us to increase the range of species that you can choose from when spotting. We will soon be implementing changes to give this much greater flexibility, without forcing you to wade through long species lists each time you classify what’s in an image sequence. Specifically, when you are spotting, you should soon see something like the screenshot below. At the top will be 3 or more “filters”, which will allow you to navigate rapidly between lists of common species, and full lists of either mammals or birds. In some cases, there might also be a list of species that are most likely to turn up among images associated with the project you are Spotting. For the vast majority of image sequences you look at, the pictured species will be in the “Common” list (which will usually be the default display). If you are lucky, however, sometimes you might see an unusual species. In those cases, you can click on the “Mammals” or “Birds” filters to find what you are looking for. Those lists are arranged alphabetically and you can use the page selectors to jump to a different page of the list. Bear in mind that it might take a little while before you find those rarer species in the lists. For example, if you are looking for a mink under “M”, you might need to check whether we have discriminated between mink species (in which case, the American mink will be under “A”). For some species, we have also retained less certain designations for when you know what sort of animal it is but you can’t identify it to species-level. For example, you can find “Unidentified bird” under “U” in the birds list, and "Small rodent (unknown species)" under “S” in the mammals list. If possible, however, do identify to species level.
Some of you might have noticed that there are new projects available to classify. Specifically, at present, we have the “Highland Red Squirrel Project” and the “North Pennines NNRs” projects visible under the “Classify Selected Project Only” menu.
The North Pennines NNRs project has yet to upload data; we will tell you more about that project when images have been uploaded. However, the Highland Red Squirrel Project has uploaded data. In case you fancy helping out with their project, here’s a quick overview of what they’re up to and why.
Red squirrels are charismatic members of the UK’s native fauna but have been highlighted as one of our more threatened native mammals (e.g., see here). Although they occur in various parts of the UK, the majority of red squirrels (c. 75% of the UK population) are found in Scotland. A range of work is required throughout the UK to mitigate threats to red squirrels, and to boost their chances of re-establishment. However, it is important that we manage remaining populations to ensure a strong base from which the population can expand when conditions have improved.
Red squirrels and their dreys are protected under UK and Scottish legislation, and there is a requirement to mitigate for any forest operations that could disturb the squirrels or damage their dreys. Forest Enterprise Scotland manages over 400,000 ha of Scotland’s multi-functional forests and need to plan mitigation for their forest operations. There is, however, very limited information about the impact of disturbance caused by forest operations on red squirrels. Without knowing the impacts of those operations, if any, it’s difficult to know what mitigation, if any, is needed.
This project is being run by a team based at the University of the Highlands and Islands in collaboration with Forest Enterprise Scotland. They aim to determine the impact on red squirrel breeding success, ranging behaviour and drey usage of habitat fragmentation and habitat loss caused by forest operations. They are also looking into the use of nest boxes as a potential mitigation measure for forest operations taking place during the breeding season. This latter aspect of the project is being assessed, in part, by determining the use of nest boxes at different heights and in different tree types. The team have set up their monitoring so that camera traps will capture animals investigating or going into and out of the nest boxes. Owing to the possibilities of false triggers and to the frequency with which other species (especially birds) will use the nest boxes, the monitoring has yielded large numbers of images. The team need as much help as possible to classify what (if anything) is using the nest boxes.
Remember: if you are working on a desktop computer, you can use the cursor left and cursor right keys to speed up scanning through a sequence. We are working on ways to improve the set of species that are shown for any project. For now, however, if you are working on the red squirrel project, you can find the red squirrel on the second page of the species options and the great tit on the fifth page. You can navigate rapidly to any page of options by clicking directly on the relevant page indicator. As always, we only want your classifications for what appears in an entire sequence, not what appears in individual images. Please make sure you’ve looked at the whole sequence before submitting your classifications and moving to the Next Sequence.
We're delighted to announce that Pen has scooped another award! This time it's Durham University's inaugural "Science Postgraduate Excellence in Outreach Award". As many of you know, Pen is passionate about science and passionate about getting more people involved in science. The award recognises the broad range of outreach activities that Pen has been involved in. These include his work on MammalWeb (including his work with Belmont Community School), his activities as an organiser of Ustinov College's "Café Scientifique" outreach programme, and his work on the College's Global Citizenship Programme. The latter included many innovative events, such as a public science day, university visits for primary school children, and a "speed-dating" event for teachers to meet with postgraduate researchers from the university, making new contacts and arranging new outreach events.
More on Pen's activities with outreach via MammalWeb can be found in this short video on his work with Belmont Community School, and this video of his prize-winning talk at the 2017 "Ecology Across Borders" meeting in Ghent, Belgium (the largest Ecology meeting in the European calendar).
We thought you might be interested to see this picture of a pine marten mother and her kits, clearly making the most of a den box provided by John Martin as part of a project to monitor pine martens in Dumfries and Galloway. The project involves a range of collaborators, including both John and Shirley, who (among other pine marten-related activities) produce pine marten den boxes, pine marten expert Johnny Birks, and Gareth Ventress of Forest Enterprise Scotland.
Roland, a MammalWeb trapper, sent in this photo which seems to capture the native/non-native squirrel conflict rather well! The photo was taken in southwest Scotland, as part of a squirrel monitoring project with which Roland is involved. Roland notes that the photo was taken in a wood in which red squirrels are abundant but grey squirrels are actively controlled. Contact between the species is highly undesirable because of the risk of transmission of squirrel parapox viris, which the grey squirrels carry but are apparently unaffected by. Red squirrels, by contrast, are highly vulnerable to the disease. There was an outbreak recently near Dumfries, not far from where this image was captured.
The photo was taken using a Xikezan R20 camera trap, which is one of the cheaper camera traps that Roland has tried out.
In response to your requests, we’re making some changes to the website. The first of those changes will mainly affect the way that you view and classify images to make the process quicker and more efficient. That change is scheduled for next Monday, the 23rd of April.
Further exciting updates are planned for coming weeks, and will include changes to allow you to view basic data showing what species you’re finding and where.
In line with new data protection legislation, we will soon be unable to send you emails unless you give us explicit permission to do so. To ensure that we can continue to communicate with you, to let you know about what we’re finding, and to keep you informed about exciting changes to the website, please subscribe to our newsletter here.
Have you thought about being a Trapper but haven't got around to it yet? One of our existing Trappers has pointed out that there are currently some highly-affordable camera traps available via Amazon. In particular, there are several camera traps in the £40 - £60 range with excellent customer reviews - e.g., see here. If you already own one of these traps, or if you do buy one and have thoughts on its performance, let us know. We can then share that information with other Trappers. Happy Trapping!
You may have read, in a previous news post, about a distance sampling method we are trialling here at MammalWeb to try to estimate animal density from camera trap images. In order to test out the accuracy of this method, and some other recently published methods, we’re doing a little test which involves counting lots of deer at Raby Castle.
The aim is to put out some camera traps to get images of the deer and then to use available methods to calculate a deer population density and see how accurate it is. Before we do all this though, the first step is to work out how many deer there are, a task less simple than it sounds!
Although it may not sound all that scientific, the best way to do a thorough count of the deer herd was to take photos of the herd as they followed a tractor which projects tasty carrots! Here are just some of the photographs I got from doing that:
After counting dozens of photographs multiple times, I eventually concluded that there are 253 Red deer and 263 Fallow deer at Raby Castle! Now we just need to put out the camera traps and see how close to that figure we can get.
MammalWeb trapper Roland Ascroft has been camera trapping in his local area of Deerness Woods ever since he borrowed his first camera from us in 2015. Since then, he has contributed a huge number of images to MammalWeb, as well as going even further by conducting his own studies on some of the species in Deerness Woods, such as the Roe Deer. He has been kind enough to write a short article about his experiences as a MammalWeb trapper and some of the findings of his studies! To read the article please click the link below.
A huge congratulations goes to Pen-Yuan Hsing who won the Overall Student Talk Prize at the Ecology Across Borders 2017 Conference held in Ghent, Belgium by the British Ecological Society. Pen gave a talk titled 'Science and citizenship: Capacity building for civic engagement through the MammalWeb citizen science project' and talked about how in addition to successful crowdsourcing of useful ecological data, MammalWeb has stimulated civic engagement. He talked of examples of this including a group of secondary school students who, with support from the BES, developed their own ecology outreach activities that were presented at public events. He also talked about MammalWeb trappers who started their own camera trapping surveys elsewhere to inform wildlife management, and do their own engagement and outreach. Winning the overall prize is a huge achievement especially considering this year the conference saw a record of 320 entries for talks and posters!
As many of you will know, this summer we had our celebration event for the official end of our pilot project, generously funded by HLF. We have been busy since then, and we hope that 2018 will see many new and exciting developments for the platform and for the project as a whole. We will try to keep you posted on developments, so please look out for the possibility to sign up for our newsletter early in 2018 (and, if we don't have your current email address, please let us know it).
In the meantime, thanks to all our participants. We hope you have a great Christmas and New Year, and we look forward to developing the project together throughout 2018. For now, we'll leave you with this lovely roe deer, courtesy of Trapper Stuart:
A new study, published in the open-access journal ‘Plos One’ earlier this year, has estimated the distribution and abundance of all UK mammals, the first attempt to do this since the last review in 1995. The study took a ‘systematic modelling approach,’ meaning it overlaid Great Britain with a grid, and for each square, using models, estimated the occurrence and density of each mammal species. No easy task!
To demonstrate the model, let’s take the example of one of the UK’s most abundant mammals: the rabbit.