Skip to main content


Sylvester has been named by the Friends of Thetford Forest because the Scots Pine, the first species to be planted when the Forest was established in the1920s and such an iconic tree, is Pinus Sylvestris.

Sylvester the Cuckoo
Sunday, June 3, 2018 - 08:00
Tagging Location:
Thetford Forest, Norfolk
Age when found:
Over one year
Satellite Tag No.:
Wing Length (mm):

Cuckoo sponsor badge

Sylvester's journey from 03 June 2018 to 06 August 2019

View routes starting..
Sylvester's position on
Show marker
Show route

Sylvester's movements

11 Dec 2018 - Sylvester lost

It is with a heavy heart that we have to report that we think Sylvester has died. Looking more closely at the data it seems that the location we received from his tag in the Central African Republic was erroneous - this happens occasionally. In actuallity, we last heard from Sylvester on 28 August in Nigeria, close to the River Niger. We have no clues as to what might have happened to him.

07 Nov 2018 - Concern for Sylvester

The last location from Sylvester's tag just over a week ago showed that the battery charge was low. We will have to wait and see if this improves to find out where Sylvester is. Fingers crossed he will pop-up soon.

19 Oct 2018 - Sylvester is alive

We have received a couple of locations from Sylvester's tag in the last week or so that show he is in Central African Republic. However, the battery charge is low and considering that he is now in an area of dense forest it might not get a good charge for a while - we will have to wait and see what happens next.

18 Sep 2018 - Where is Sylvester?

We last heard from Sylvester on 28 August and his last transmission showed that his body temperature was fine, which tells us he was alive. However, his battery charge was low and looking at previous data we can see that the battery charge had been falling during the previous week and not recovering. This can happen when our Cuckoos are under the thick canopy in the rainforest and we have lost Cuckoos for as much as six weeks, only for them to pop-up again once their battery gets a good charge.

Of course we don't know for sure what has happened but all we can say is that when we last heard from him he was alive and that there was an issue with the tag which we hope will resolve itself - fingers crossed.

23 Aug 2018 - Sylvester is on the move

During the last week Sylvester has moved south and east, through Mali, Niger, Benin and into Nigeria. He is just to the west of the mighty river Niger and to the south of a village called Bawanka.

Past updates from Sylvester

Get involved

Find out how you can support the project, or contact us directly for further details -

Donate to help us run the Cuckoo Tracking project.

Sponsor an individual cuckoo with a monthly Direct Debit or make a one-off donation.

Information on this page is for illustrative purposes only and should not be reproduced without permission
© British Trust for Ornithology.