Updates from our Cuckoos

Carlton II has started the next stage of his migration, leaving his last location in Mali and flying 1,434 km (891 miles) East to Nigeria, via a brief stop-off in Benin. Carlton II is now in the Dagida Game Reserve in western Nigeria. In 2018, Carlton II spent two and a half weeks in this game reserve from mid October to early November before pressing on through Cameroon to Gabon, where he spent the winter.

PJ has been in northern Nigeria since early August and, looking back at previous years data, could be on the move shortly to Cameroon. In the last couple of years he has arrived there in the first week of October,  later making his way south to winter in Angola. Keep watching this space!  

Over the last few days Norfolk Cuckoo Tenysson has flown 644 km (400 miles) south from Nigeria into Cameroon. He is the first of our tagged Cuckoos to make this next leg of the journey and he is now in far eastern Cameroon, close to the border with Central African Republic. It is the rainy season in this area now and the weather today will be between 68 and 83 F (20 to 28 C) with 76% humidity and thunderstorms bringing a 40% chance of rain. This is probably another stop-over point for Tennyson and we expect him to move further south over the coming days or weeks.

Over the weekend Carlton II left Senegal and has flown 534 km (332 miles) east into Mali. He is now in the south eastern part of the Kayes region of Mali, approximately 145 km (90 miles) north west of the capital, Bamako. Cuckoos Valentine and Senan are over the border in Burkina Faso while PJ and Tennyson are more than 1,500 km further east in Nigeria. 

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.

In the last couple of days Valentine has flown 74 km (46 miles) north west from his last location towards the border with Mali. He is now close to the city of Solenzo in the far west of Burkina Faso.

Tennyson seems settled near Gwardena in Adamawa State in north eastern Nigeria, where he has been since 28 July. 

Senan only stopped in Niger for a couple of days before flying another 256 km (160 miles) south west, across the border into Burkina Faso. He is now in the far south of Burkina Faso, close to the borders with Togo and Ghana, 205 km (127 miles) south east of the capital Ouagadougou. Another Cuckoo, Valentine, is also in Burkina Faso but is 465 km (289 miles) west of Senan. 

Since arriving on 5 August, PJ has stayed in the far north western corner of Nigeria, in Sokoto state. He is currently approximately 38 km (23 miles) south east of the city of Sokoto. This is an area which PJ also spent a couple of weeks in on his way south in 2017. 

We last heard from Nussey on August 10 when he was still in Spain. His latest location shows him near La Portera and Hortunas, approximately 60 km (38 miles) west of Valencia.