The project
The aim is to understand how Palearctic-African migrants use and move around the different vegetation zones found in West Africa, ranging from the semi-desert Sahelian region in Burkina Faso to the lush tropical rainforest in southern Ghana, and whether habitat change may impact them on their wintering grounds.
During the temperate winter of 2009/2010, using point count methodology and mist-netting, we recorded migrants along a degradation gradient at five different stations on a north-south transect. In 2010/2011 we plan to re-visit these sites as well as roving further afield to get a broader picture of migrant habitat use.
At Tono Dam and the irrigation project sites, Ghana 24th to 29th October 2010
At the airstrip, Kulbia, Ghana 20th to 24th October 2010
Driving between Navrongo and Bolgatanga in the Upper East region we headed to a disused airstrip, which served as the first camping area for the Ghana team (with permission from the local chief and elders of the nearby village of Kulbia).The airstrip campsite near Kulbia (above) and meeting the local chief (below)
Activities at Ouagadougou from 15th to 20th October 2010
The Nature Park at Ouagadougou housed interesting, melodious, chanting, diverse bird species such as the Yellow-crowned Gonolek, Western Grey Plantain-eater, Vinaceous Dove, Laughing Dove, Village Indigo Bird, Little Bee-eater, White-billed Buffalo Weaver, Yellow-billed Shrike, Red-cheeked Cordon Bleu, Red-billed Firefinch, Yellow-fronted Tinkerbird, Common Bulbul, Double-spurred Francolin, African Paradise Flycatcher, Pied Kingfisher, Senegal Coucal, Hamerkop, Rose-ringed Parakeet, Northern Puffback and numerous species of sunbirds and weavers. Walking through the tumultuous path of birds, an attentive ear heard the calls of the Common Nightingale and the Western Bonelli’s Warbler.
Thanks to technology, Chris kept to his explicit leadership role and soon got both teams set for work in their respective places in Burkina Faso (Aly and Oumar) and Ghana (Chris, Tina, Mohammed and Abraham) by Wednesday the 20th of October.
The new field season has started!
12 October 2010 - Chris Orsman (the RSPB field team leader) and I spend all day with our colleagues at the Ghana Wildlife Society, agreeing contracts , sorting insurance and licensing for the vehicle and driver to cross the border into Burkina Faso and arranging permits for the team to work in Forest Reserves and National Parks. We also had the task of inspecting equipment that had been stored in Accra since it was last used back in March – some sleeping bags were in serious need of airing!
13 October 2010 - The team leaves Accra before dawn to avoid the traffic, setting off on a 12-hour drive north to Tamale - a distance of almost 800km. Although good progress can be made on some roads, with surprisingly good tarmac, others needed more care with depressingly bad pot holes being very common. It's one way to see a lot of Ghana - albeit in a very narrow strip! The ‘team’ comprises Tina (who was with the team last years) and the driver Abraham who will be with Chris for the first month of roving field work (along with a Naturama field worker who we will pick up in Burkina Faso)
14 October 2010 – Crossing the border between Ghana and Burkina Faso at Paga. Having spent 12 hours in the caryesterday, we mae sure we made a few stops during the journey today, particularly as we crossed water bodies. We saw our first Palearctic migrants - a male Pied Flycatcher at Nasia and a few kilometres further north a group of juvenile Barn Swallows at Kukubila. A quick stop at Paga (minutes from the border) for rice and beans - a bargain at 2 cedis (just under £1). Paga is relatively famous for its pools of 'sacred crocodiles' - you can buy a sacrificial chicken to feed to them - this will apparently bring you good fortune. Perhaps more good fortune for the chicken salesmen than the chicken! It was all we could do to concentrate on our rice and beans - forget scrounging dogs and cats, we ate lunch with a large crocodile (ca 4 metres long) sitting motionless with a gaping jaw and a fixed stare just yards from our table.
Crossing the border was an expensive and rather protracted battle, with recent changes in visa charges meaning we faced a cost of 94,000 CFAs per visa (rather than the expected 10,000). With the alternative being to drive back to Accra and buy one cheaper there, we swallowed our frustration and delved into our pockets for the extra cash. This is where you are hit with the double whammy - the money changers at the border have an absolutely captive audience - stranded in no mans land between Ghana and Burkina, the nearest bank or cash point 200km away – they can set their price. We finally entered Burkina 3 hours later and ca £280.00 worse off! From here onwards the savannah landscape becomes more open and dusty - Acacias scattered across bare ground with farmed patches of millet and sorghum before reaching the outskirts of Ouagadougou (Ouaga for short) and being hit by the flood and buzz of a multitude of mopeds and bicycles. The end of another 12 hour journey.
15 October 2010 - Another day of negotiating contracts, this time with Naturama, our partner in Burkina Faso. Also, more equipment sorting, with the able help of Mohammed (our Naturama team member), Omar and Aly (members of the Oursi Site Support Group - the northern most site we worked at last winter). Sadly, and following FCO advice, our site at Oursi is now out of bounds to our UK project staff as there are risks from terrorist activity in Mali and Niger spilling over the border. In order to continue the work there, we are employing Aly and Omar to undertake a full schedule of ringing and point counts at Oursi, allowing the project to continue to collect data from the site. Through there work with Naturama and others in the past, and having worked and trained with the project team last winter, they are both highly competent and we are extremely thankful to have them on the team again.
16 October 2010 - An early start to set up a few nets in farmland at Gonsa, ca 15km west of Ouaga. Almost 80m of net and 3 hours of ringing yielded only 3 birds - the first bird of the 2010/2011 field season being a Red-cheeked Cordon Bleu, closely followed by a Black-rumped Waxbill and a magnificent Long-tailed Glossy Starling. Late in the evening Chris and the team drop me off at the airport - I must say goodbye here and return to the UK. It's been a hectic few days...
17 October 2010 – Sitting at Casablanca airport waiting for my flight connection and I receive a text from Chris Orsman - the first bird of the day in the net - a Common Redstart!
13th October 2010: starting the season - a team members perspective
Burkina Faso: last ringing update of the first field season
On the ringing front, I've calculated that we did 10 sessions spending 36.5 hours with nets open, which averages out at 3.65 hours per session. This may not seem a lot, but one has to take into account the rapidly rising temperatures during the morning and the necessity to close nets before it gets too hot. The four sub sites each had the scheduled eight sessions between them plus the Village site had an extra session thrown in due to logistics with transect surveying. Having completed the ninth session, we were rather surprised to have only processed 227 new birds and 18 retraps. Furthermore, this total included but one new Redstart (the same as the previous visit), so we were scratching our heads as to where were all the migrants? Reports from the transects indicated that migrant numbers were still good, with more sightings in the latter few days.
So, more in blind faith, we set five nets at a new location for the final morning's session. This was on a promontory bisecting a small barrage (reservoir). Thirty minutes after unfurling the nets we undertook the first round and were rewarded with good numbers of birds, including two new Willow Warblers, a species that Chris had noticed an increase of on his transect work. Most birders will know of Sunbirds, which are an integral part of African fauna. Well this catch yielded what I suspect might be a record catch of one particular species, the Scarlet-chested Sunbird in one round. We caught an unlikely 56 individuals as well as 7 Beautiful and 2 Pygmy Sunbirds! (74% of the catch) Other gems included a sprinkling of Yellow White-eyes, 2 Senegal Batis, a Lead-coloured Flycatcher, and 2 Red-faced Cisticola.
Prior to this last session, we were entreated to some wonderful local species eg. a retrap Shikra, Yellow-crowned Gonolek, Greater Honeyguide, Yellow-billed Shrike, Red-throated Bee-eaters, a Rufous-crowned Roller and an Abyssinian Roller, both from the same net at the same time about 2 feet apart!
Rufous-crowned Roller (top) and Abyssinian Roller (lower)
Other delightful local resident species were Brubru, Bronze Mannikins, African Pygmy Kingfisher, Pale Flycatcher, Grey-headed Kingfisher, African Blue Flycatcher, African Paradise Flycatcher, Brown-rumped Bunting, White-shouldered Black Tit, Lavender Waxbill, and Brown Babbler to name but a few!
African Blue Flycatcher - certainly stands out more than Spotted Flycatcher!
And a trio of Grey-headed Kingfishers....
Both Aly and Omar worked incredibly hard and were quick to learn. They are both well on the road to mastering extraction from mist nets and processing techniques and we look forward to working with them again next season. During the final days of our stay it seemed like perhaps more migrants still were beginning to filter through into the area from further south, so next year the project may continue fieldwork well into April. Six days after returning to the UK I have had my first Swallow north in the local water meadows. However, I am far from impressed by the most un-spring like weather and am having to wear gloves on the dog walk!
18th March, Brenu Beach - Fieldwork drawing to a close
Kogyae was very interesting with a little more mud on the terrible road and a little more burning having gone on since we last visited, particularly in the reserve, which was blamed on poachers who had been subsequently arrested, opening up the understory of the dense woodland there. Much of the previously burnt ground was regenerating as in Damongo further North. 24 Pied Flycatchers were seen or heard compared to 15 on the previous visit, perhaps indicating that numbers have increased slightly or the birds have become more detectable, possibly some birds had moved into the more recently burnt woodland from elsewhere. 12 Melodious Warblers were recorded, 6 of them singing, as was also common in Melodious Warblers in Damongo, compared to 8 recorded with one singing last time. Five Tree Pipits were seen, whereas none were recorded last time and 6 Whinchats (looking rather grand in fresh breeding plumage) compared with 12 last time, which may indicate a decrease but the numbers were small enough to be unsure of this. Some points with Whinchats recorded previously did not yield any this time but a snap-shot point count does not necessarily mean all birds in the vicinity were recorded! Interestingly, though, slightly fewer Whinchats were also recorded in Damongo. 12 European Bee Eaters had turned up since last visit, 8 House Martins were on transects with a flock of 30 plus also seen near camp and, most strikingly of all, 58 Willow Warblers recorded, most of them singing, compared to 30 last time when no song was heard at all. One transect on the penultimate day produced 21 Willow Warblers in open scrub and teak with scattered large trees, compared to 8 last time. Surely this is either indicative of either a recent influx of new individuals or higher detectability due to increased frequency of vocalisations, in either case it seemed like they were preparing for an imminent journey. Some extra bonus migrants in Kogyae included a female Short-Toed Snake Eagle, an immature Peregrine Falcon and a single Barn Swallow.
Ringing at Kogyae was also very interesting with 20 new migrant birds caught and 3 retrapped from previous visits, all at the one ringing site outside the reserve, compared with around five migrants caught at the same site in February. Ringing effort was higher this time due to two ringers being present, with 3 mornings compared with 2 last time and 2 afternoon sessions catching one migrant each, but it does seem that relative catches of migrants were up. In total 8 new Melodious Warblers were caught, suggesting that the transects in the Kogyae habitat underestimate their numbers, with one retrapped from January. 6 new Willow Warblers were caught, some using a tape-lure, as well as 3 new Pied Flycatchers, 1 carrying a lot of fat, and one from December. 1 new Nightingale and 1 from December with much fat, 1 new Spotted Flycatcher and 1 new Garden Warbler rounded off the migrant captures.
Melodious Warbler, Kogyae

Pied Flycatcher, Kogyae

Nat recording habitat data on a point count, Kogyae

Charcoal burning - a common occurrence in Kogyae

After a day or two in the capital, Accra, we were off to Kakum again, in the forest zone about 25 km inland from the city of Cape Coast. There had been slim pickings previously as far as migrants go on the five transects here and not a huge amount had changed this time, though a few Barn Swallows had been joined by a small number of European Bee Eaters over the plantations on the edge of the National Park, common swifts were not seen in contrast to 32 seen flying (of course) on the previous visit. One transect did throw up a couple of House Martins, a foraging Willow Warbler and a Spotted Flycatcher flycatching what must have been a stick insect, it isn’t nesting here like Chris O’s turtle dove is it? I very much doubt it. Otherwise a Melodious Warbler seen at the new ringing site was the only other migrant confirmed. Still no definite Wood Warblers, sadly. No migrants were caught over 3 mornings ringing, 2 at a brand-new site since the CES site has mostly been cleared to make way for a new plantation, despite close to 200 birds being caught in total. Some of the highlights of those caught included Western Bluebills, White-Tailed Alethes and a White-Crested Hornbill with a tail almost as long as Steve is Tall……
Plantation and forest at the edge of the National Park

Clearing net rides in the rain forest is hard work!

The Ringing Base at the new Kakum site - Tina, Steve and Rachel

Blue-Billed Malimbe, Kakum

Beautiful Brenu Beach (where I’m again very happy to be writing this blog from) has revealed 3 Spotted Flycatchers on one transect in rather open scrubby habitat a little inland, compared to one seen off-transect in a cassava field last time. Have they been here all along and switched habitat later in the winter as other habitat became unsuitable or have they moved in from elsewhere in the past month? It seems a little dryer here than last time. One Whinchat was viewed on transect and one off-transect, two were also recorded previously. No Garden Warblers or Nightingales have been recorded on transects but one of each have so far been caught during mist-netting, the Garden Warbler with little fat and the Nightingale seemingly fattening up for migration, as well as one Melodious Warbler, so very recent reports further North of possible passage of Nightingales and Melodious Warblers may well be true but not all have yet moved on.
Tourism on the coast is developing at break-neck speed and some coastal scrub has already been cleared even since our last visit. A nice-looking patch of scrub next to our constant-effort ringing site has been ear-marked for a new resort so this valuable habitat for Nightingales and Garden Warblers is certainly under threat at the moment, making it all the more important that we find out soon how habitat change may affect declining populations of wintering migrants. It’s been a pleasure to have been in Ghana working on this project over the last 10 weeks or so and I’m looking forward to looking at the whole dataset for these last two visits. The thanks, of course, must go to Chris Hewson for becoming a father leaving me to step into his fieldwork shoes (not literally you understand) – congratulations Chris!
Tina with a Pied Crow, Brenu

The Transect Team - Nat, Tina and Mark