Author: Chris Collett

Blog Post: Mannin’s failed sea-crossing

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 .            

Blog Post: Meet the Hen Harrier Class of 2017

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.  

Blog Post: Hen Harrier Day 2017 – in pictures

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)  

Blog Post: Skydancer from Russia with love

The RSPB’s Bowland Project Officer James Bray gives the lowdown on Bowland’s special new visitor. RSPB staff and volunteers on the United Utilities estate in Bowland are out in the hills monitoring and protecting birds of prey every day of the week in all types of weather. We have been spending much of our time looking for returning hen harriers over the past few weeks in some rather un-spring-like weather so yesterday I was elated when I looked up and saw a mature male harrier skydancing low over my head. The bird disappeared out of sight down a gulley very quickly so I headed to a different position for a different view, happy that another male hen harrier was back on the estate. Over the next few hours the harrier was skydancing and hunting the slopes, mostly at very long range in a welcome bit of heat haze. I gradually got better and better views, and as the sun dropped a bit I began to strongly suspect that it was actually a pallid harrier. I called a good friend who was nearby and as we returned to the site the harrier flew low along the opposite hill giving superb views for the first time, allowing us to confirm that it was a mature male pallid harrier . Pallid harriers are rare visitors to the UK, most recently juvenile birds in the autumn. Adult males are exceptionally rare in the UK but one was seen near Hornsea in East Yorkshire early last Sunday morning and this is likely to be the same bird. Thanks must go to Mark Breaks for the photographs of this stunning bird. It’s not a hen harrier (the focus of my work), but I didn’t allow that to temper my excitement at having found a very beautiful and rare bird. We would like other birders to see this bird but must ask that people strictly follow the access arrangements as detailed below.   Access arrangements Please be aware that the pallid harrier is in a valley that is a four km walk from the nearest public parking. The walk is on a private road and vehicle access is only permitted for estate workers and the tenants that live and work here. BIRDERS MUST NOT  drive along this road, and will be asked to leave if they do.     Cars must only be parked in the pay and display car park in Dunsop Village at SD662502. The road to walk on is then accessed by walking west through the village (toward Lancaster and the Trough) over the river and take the first right. Follow this road north for approximately 3.5 kms up the Dunsop Valley until the road splits. Take the right hand split and walk for another 500 metres. The harrier has been hunting the slopes below the cairn on the hill on the other side of the river. Best views have been had from around the first cattle grid that you reach on this road after the split (approximately SD659543).   There are schedule 1 species nesting on the estate so it is vital that people coming to watch the harrier stick to the tracks so as not to cause disturbance at what is a really sensitive time in the breeding season. Please feel free to ask anyone that you see off the road to stick to the road!   We must also respect the goodwill of United Utilities, the land owner, as well as their tenants, who are incredibly supportive of our work so please stick rigorously to these access arrangements. There is a very nice cafe in Dunsop Village (Puddleducks) and there are toilets by the pay and display car park. Thank you, and good birding!