Named by sponsor Marie Claire Kazmierczak for a local (Co Clare Ireland) saint who was known to be an exceptional traveller - he travelled across Europe in the 510-520 ad period. Let’s hope this cuckoo is also an exceptional traveller.
- Thursday, June 6, 2019 - 09:00
- Tagging Location:
- BTO Nunnery Lakes Reserve, Norfolk, England
- Age when found:
- Satellite Tag No.:
- Wing Length (mm):
16 Mar 2020 - No news from Senan
We haven't received any further updates from Senan since 20th Feb when he was in Congo, close to the border with Gabon. Hopefully we will hear from Senan when he starts to move north again.
21 Feb 2020 - Senan in Congo
A good quality location from Senan's tag during the morning of 20 February showed that he is in Congo, very close to the border with Gabon. It could be that he didn't spend very long in northern Gabon and that he has been in northern Congo for the last month or so, an area where other tagged Cuckoos have spent the midwinter period.
07 Jan 2020 - Senan in Gabon?
We were surprised when Senan hadn't moved on in the latter part of 2019 however, the area he was in within Benin had received extra rainfall in the previous three months, and was likely to be greener than normal for the time of year. Other Cuckoos were also later moving from West Africa into the forest zone this autumn, presumably for this possible reason. A new poor quality location received in late December indicates Senan could now be in northern Gabon, in or close to the Minkébé National Park. This would be a logical position for him. The battery on the tag is low, and has been for some time, but hopefully we will receive further signals which will confirm this, so that it becomes visible on the maps shortly.
07 Nov 2019 - Senan moves on
Senan had been in Burkina Faso since 21 August but signals on the 5 November show he was ready for change of scenery. He left the location he has spent the last 13 weeks in and travelled 350km (220 miles) south-east to Benin. He is currently on the southern edge of the Wari Maro Forest Reserve.
04 Sep 2019 - A challenging autumn migration
The last few weeks have been quiet and for those who had not yet completed their desert crossings, it looks like the challenging conditions have claimed more of our tagged Cuckoos.
Unfortunately no further signals have been received from Knepp. From the temperature data and movements at the time, he was alive on 12 July, when we last heard from his tag. Though the battery charge had been low for a few days, there is no evidence of long term battery decline so we can't be sure what has happened to him - either he, or the tag, appear to have died suddenly.
Lambert, who was still in France, has not moved on south and signals on 21 August showed high temperature fluctuations across the day, indicating the bird's body temperature and behaviour were not regulating it. We've heard nothing since then, and his tags battery charge had suddenly dipped, all of which leads us to believe he has likely died.
Unfortunately the challenging conditions have also impacted on Nussey who has already attempted two trips to Africa and retreated to Europe. Abnormally low temperatures were received at the time of the last messages (16 August), having previously been fine. He was not migrating at that time, so the low temperatures were not due to high altitude, and the battery was also much lower than previously, further suggesting he was dead.
The droughts and exceptionally high temperatures in Europe appear to have proved difficult for our Cuckoos this year, however the five south of the Sahara are still regularly transmitting. Valentine, PJ, Carlton II and Tennysons' tags have all sent signals during September and the last signals received from Senan's tag were at the end of August and show him still in Burkina Faso.
Donate to help us run the Cuckoo Tracking project.
Information on this page is for illustrative purposes only and should not be reproduced without permission
© British Trust for Ornithology.