Our new(ish) Hen Harrier LIFE Project Manager Dr Cathleen Thomas reflects on her first few months in the role. Avid followers may have noticed that we’ve been a bit quiet on the blogging front lately. Some of you will know that Blánaid Denman left the Hen Harrier LIFE project in August to become the RSPB’s Area Conservation Manager for the North East and Cumbria. Blánaid has done some great work on the project and we’re sad to see her go, but the baton has been passed on and I now have the privilege of managing the Hen Harrier LIFE project through to its end. I’ve had a mind boggling couple of months getting up to speed with our hen harriers as the project reaches the halfway point. This year we satellite tagged more birds than ever before and it’s amazing to see how much we’re learning about their dispersal and range, providing vital evidence to help protect this beautiful and threatened bird of prey. It’s particularly interesting for me as during my PhD I studied movements of ladybird populations. Since we didn’t have the technology to put tiny tags on ladybirds, I had the laborious task of analysing DNA to estimate movements between populations, so I’m really excited to see the amazing ecological insights we can gather as technology advances. Hen Harrier LIFE+ Project Manager, Dr. Cathleen Thomas - image by Nicola Thomas As we follow the birds we can start to explore individual differences and build up a picture of how they move around the UK and beyond. You may be familiar with DeeCee, a female hen harrier who was born in Scotland in 2016 and was fitted with a satellite tag just before she fledged from her nest last summer. We’ve been able to follow her movements and saw that she spent the winter at a roost in Mull, travelled down to Argyll this summer, then returned east to Aberdeenshire where she successfully raised three chicks with her partner, two of which we tagged this year - Sirius and Skylar. Whilst DeeCee remained in Scotland, other Scottish birds have travelled to the continent, such as Chance who travelled to France and Tony who travelled to Spain. This is an amazing feat, particularly when you consider that these birds are often only a couple of months old when they make these journeys. Following the birds during their lifetimes shows us some interesting things, but sadly we also see that first year mortality is high for hen harriers. Satellite tags allow us to build up a picture of the lives and fates of hen harriers. Whilst some have gone missing without explanation, the birds we are able to retrieve allow us to investigate the cause of death. Birds that have been found shot in recent years and video footage of hen harriers being persecuted serve as reminders of the risks faced by these young birds. Tagging so many birds will hopefully allow us to better understand the risk factors for young birds, where they face the biggest threats and what proportion of them survive their first year and beyond. The project focuses on seven Special Protection Areas in the UK, and to support this direct conservation work we’re in the process of carrying out a public attitudes questionnaire, to help us understand how much people know about hen harriers in and around areas where they are protected. This will help us to target our community engagement work to make the biggest difference for our hen harriers and find more hen harrier heroes to champion the species. All in all, it's an exciting time to be joining the Hen Harrier LIFE project and I look forward to seeing how it unfolds over the coming years!
Such a sad blog , at least it is known what happened to the pair , let us hope for the remaining birds survival
RSPB Scotland’s Investigation Intelligence Officer Jenni Burrell provides an update on Mannin, the Isle of Man sat-tagged hen harrier. Monitoring satellite-tagged hen harriers can bring many positives – following an individual bird from the day it was fitted with a transmitter until its first flights away from the nest area, its travels through the UK (and beyond in some cases ) or even hopefully until its own first nesting attempt. Unfortunately, however, it can also bring some negatives. Sadly, here, we report on the death of another of our 2017 birds. Mannin, along with his sister Grayse, was tagged on the Isle of Man on 3 rd July 2017 by trained & licensed members of the Scottish Raptor Study Group and Manx Ringing Group in partnership with Manx Birdlife. After fledging in July, Mannin explored his home island until 14 th August, when the tag data showed he had departed the island and headed north towards the Galloway coast in SW Scotland. Sadly he never completed this journey, and the data showed that he had gone down in the sea, approximately 5km off the Scottish coast. Mannin and sister Grayse - image by James Leonard We have not lost one of our tagged birds at sea before, and while we were almost certain he had died, we were unsure if the tag would continue to function or when we would eventually lose track of Mannin, if the voltage in the tag’s battery declined or if his body sank to the bottom of the sea? A few days later, on 24 th August we had our answer. The satellite tag had continued transmitting, and the data showed that Mannin was now located on the shoreline. After a brief search of the area, near Kirkcudbright, my colleagues soon found Mannin’s remains and the tag. As with all recovered birds we submitted his body for examination, at the SRUC Veterinary Laboratory. Their subsequent post mortem report said that there was no evidence of trauma or health problems and that Mannin had eaten a small mammal recently. We’ll never know what caused Mannin to go down in the sea. Maybe he was caught in heavy rain, and with nowhere to land, became waterlogged and was unable to complete the sea crossing? Whatever the cause, it was a sad end to his short life. Map of Mannin’s movements Sadly, Grayse has also died, also just a few weeks after fledging. She was recovered on the island on 9 th August after her tag showed that she had died. Her body was examined by ZSL whose interim diagnosis did not implicate human interference as a cause of death. Neil Morris from Manx Birdlife said “Obviously, everyone involved in the project here in the Isle of Man is desperately sad that Grayse and Mannin have perished. Their early demise highlights the vulnerability of young birds learning to fend for themselves once they have fledged the nest. It also underlines the need for a large healthy population that can withstand such losses. “At the same time, it’s wonderful to see Aalin coming through her first year so well, and to get such an insight to her behaviour. We need to know so much more about these wonderful birds of prey in order to formulate ever better conservation strategies. We shall continue the work to study Hen Harriers on the Isle of Man.” Whilst the deaths of both of these birds through natural causes is disappointing, the finding of their bodies and recovery of them and their tags was straightforward. As you would expect, their transmitters continued to provide us with good location data, even after one of them had spent ten days in the sea. This is, however, in marked contrast to the disappearance of “ Calluna ”, whose perfectly-functioning tag’s transmissions ended very abruptly on 12 th August. Her last recorded position was on a grouse moor, a few miles north of Ballater, in the Cairngorms National Park, and her disappearance can rightly be regarded as highly suspicious. Here’s hoping that the ten remaining birds from the Class of 2017 continue to thrive and provide us with many more positive stories. You can follow them here .
Good luck to them all. Is this statement on the BBC website about Calluna missing Chris "Scotland remains a stronghold for the birds, with 80% of the UK population. Current estimates suggest there are about 600 breeding pairs across the UK."
RSPB Scotland’s Investigations Intelligence Officer Jenni Burrell introduces the new class. This year the Hen Harrier Life Project website has been improved to provide a more interactive experience for visitors. You can choose to look at individual birds, track their journey and look at any points of interests that appear. The profiles of twelve of this year’s satellite-tag hen harriers are now online and what a brilliant bunch they are. Take a look on the website to learn more about their stories and meet: Calluna (image by RSPB) Eric (image by Alan Leitch) Heather (i mage by Brian Etheridge) Lia (i mage by Guy Anderson) Mairie (i mage by Paul Howarth) Mannin (i mage by James Leonard) Manu (image by Tim Jones) Rannoch (i mage by Brian Etheridge) Saorsa (i mage by Brian Etheridge) Skylar (image by RSPB) Sirius (image by RSPB) Tony (i mage by Dave Anderson) Sadly Calluna is no longer with us. Calluna’s sat tag transmissions abruptly ended on 12 th August, with no further data transmitted. Her last recorded position was on a grouse moor a few miles north of Ballater, in the Cairngorms National Park - Jeff Knott has written this blog about her. You’ll be able to follow the progress of the other birds as we map their movements online. To protect sensitive breeding sites, maps of their movements will only be added as soon as they’ve dispersed away from their nest sites. We have already been able to share the first movements of Heather, Eric, Skylar, Sirius and Saorsa who have already proved to be adventurous and spread their wings. We’ll add the remaining birds as soon as we can. You may notice that only one of last year’s birds is back on the website. After a very successful breeding season, DeeCee has moved away from the nest site so we are able to share her movements again. Don’t worry, the other four are safe and well, but have yet to move away from breeding areas. We will keep you updated and will begin to map their movements in due course. In the meantime, see what they have been up to in a previous blog . It’s going to be an exciting year following these birds and seeing what they get up to and we can’t wait to share it with you.
My expectation is that far more hen barriers are being lost to persecution than the 30% of golden eagles. A scientific paper proving this is necessary because pf the power of those responsible for the persecution.
Whilst I do hope that no more hen harriers are lost like Calluna, it is more realistic to hope that enough hen harriers will be tagged to give an estimate of the first and subsequent year losses to persecution just as has happened with golden eagles. My expectation that
I'm afraid that anyone questioning the reliability of satellite tags needs to pay attention to one fact - the location where the tracking ceased. Grouse moors relentlessly raise their ugly heads when this question is asked. The truth is that Calluna will be far from the last bird to be lost unless something drastic is done to consign the hideous world of driven grouse shooting into history.
I’m very sad to have to report that one of the hen harrier’s satellite tagged as part of the LIFE project this year, has already disappeared. “Calluna”, a female harrier, was tagged this summer at a nest on the National Trust for Scotland’s Mar Lodge estate, near Braemar. We were monitoring her transmitter’s data which showed that she fledged from the nest in July. She left the area in early August, and gradually headed east over the Deeside moors. However, while the tag data showed it to be working perfectly, transmissions abruptly ended on 12 th August, with no further data transmitted. Calluna’s last recorded position was on a grouse moor a few miles north of Ballater, in the Cairngorms National Park. For regular followers of our hen harriers, this will be a depressingly familiar story. I’m sure some will focus on the date transmissions ended – the 12 th August, the traditional start of the grouse shooting season. Bluntly, the date isn’t really the point. The disappearance of one of our hen harriers is a major loss whenever it occurs. While we will likely never know for certain what happened to Calluna, it fits a pattern of disappearances where perfectly functioning tags suddenly stop transmitting and are never recovered. She joins the growing list of satellite-tagged birds of prey that have disappeared, in highly suspicious circumstances, almost exclusively in areas intensively managed for grouse shooting. The transmitters we use are incredibly reliable and the sudden halt in data being received from it, with no hint of a malfunction, is very concerning. I started working on hen harriers for the RSPB 10 years ago next month. One of the first documents I helped produce discusses how terrible it was that there were only 14 successful hen harrier nests in the whole of England that year. This year there were three. It’s appalling to me now that those historic 14 successful nests in one year would be treated like a breeding bonanza today! But despite that lack of progress and the continued disappearance of hen harriers like Calluna, I remain optimistic. More people know more about the plight of these amazing birds than ever before. In Scotland the Cabinet Secretary for the Environment has commissioned an independent group to look at how grouse moors can be managed sustainably and within the law. And there are still lots of other young hen harriers out there with satellite tags on, thanks to the LIFE project. The team has fitted a significant number this year, with the very welcome help from landowners, including the National Trust for Scotland, who value these magnificent birds breeding on their property. You will be able to follow the trials and tribulations of some of those birds very soon. Check back here for more news. These tags help us not only better understand and protect hen harrier, but also bring new voices into the fight to save them. Hopefully no more of our hen harriers go the way of Calluna. If anyone has any information about the disappearance of Calluna we urge them to contact Police Scotland as quickly as possible.
Here are a selection of photos from last weekend's Hen Harrier Day events at RSPB Arne, RSPB Rainham Marshes, Sheffield, Boat of Garten and Vane Farm Tayside. Hen Harrier Day South - RSPB Arne - (photos by Terry Bagley) Hen Harrier Day Highlands - Boat of Garten (photos by Guy Shorrock) Hen Harrier Day Sheffield Hen Harrier Day - RSPB Rainham Marshes Hen Harrier Day - Vane Farm, Tayside (photos Guy Shorrock)