The bees and their nemeses

The Blue-cheeked Bee-eater, Merops persicus, is elegance personified.

It breeds in Morocco and Algeria, but winters south of the Sahara in West Africa, including The Gambia. It really does eat bees, and also dragonflies. They will not go short of food. Here is a local wild bee-hive, a huge dramatic edifice hanging from a large rainforest tree in the Bonto forest:

The bee-eater is off to hunt.

a graceful turn

and it’s on its way.

I have left room for one more, a close relative, the Swallow-tailed Bee-eater, Merops hirundineus:

Azure eyebrows, gorget (a great word, from the days of armory) and rump: maybe the most gorgeous yet?

It doesn’t seem to migrate, but no-one really knows. It’s not very common north of the equator (ie Gambia!), more often seen in southern Africa.

The Irish Parrot

These Senegal Parrots, Poicephalus senegalus, are nesting in the trunk of a dead palm tree:

They are both caparisoned in orange and green, so one would think they might be adopted as the mascot of the Irish Republic. Here is one in close-up:

It produced a nut, which it tried to crack, using its hefty beak and the tree for leverage.

They are mainly fruit eaters, plus some flowers and, apparently, nuts!

I suspect President Biden would like this parrot!

Breaking all records: the Bar-Tailed Godwit

I’ve never lived on any coast anywhere, and so shorebirds (let alone gulls, terns etc) are a mystery to me. We spent a day in The Gambia at Kartong Wetland and Tanji beach and fish market. This smallish beige bird didn’t seem impressive at first glance, except for that insouciant slightly up-curved bill.

It’s a Bar-tailed Godwit, Limosa lapponica. I watched a trio of them foraging the tidal zone. They dig that long 12cm (5 inch) bill deep into the wet sand, looking for tiny shellfish and worms:

If necessary their whole head goes underwater:

but if the next wave threatens deeper water, they run for the shore:

And if either an excessively large wave, or a human, approaches, they take off, finally allowing me to see that barred tail:

All fun to watch, but the mind-blowing bit is where they go to breed: Siberia. Here is a map of their migration routes ( from https://osme.org/2017/05/world-migratory-bird-day-bar-tailed-godwit/):

These ones are the sub-species Limosa lapponica taymyrensis, in pale green. Every year they fly to the top of the world and back, a journey of some 16,000 km a year. They stop halfway at the Wadden Sea in the Netherlands for a month to refuel, before continuing further to Siberia (or Greenland). The map below has more detail for where these West African birds go in the summer, (from Versluijs et al 2011):

page10image251166480

The population of this subspecies, though still large, is in worrying decline, having dropped from 746,000 to 495,000 over the past 30 years. The species as a whole is now considered Near Threatened by the IUCN

PS The sub-species of the Bar-tailed Godwit found in Alaska migrates even further, down to New Zealand, for a round trip journey of some 25,000 km p.a. Their non-stop southbound migration of 11,000km in the boreal fall “may represent the longest nonstop migratory flight of any bird, certainly that of any shorebird.”(Birds of the World). To do this, they build up huge fat reserves and reduce the size of their digestive apparatus.

PPS Another record-breaker that winters in West Africa is the curlew relative the Eurasian Whimbrel, Numenius phaeopus. This population mainly goes north to Iceland to breed. Some stop in Ireland en route, but many fly direct, over the Atlantic, up to 1000 Km a day! Birds of the World reports that “Four birds tracked in 2012 using geolocators flew non-stop from Iceland to their wintering areas in West Africa, covering distances of c. 3,900 to 5,500km in five days and, on occasion, achieving the fastest recorded speeds for terrestrial birds on long-distance flight over oceanic waters (up to 18–24m/s)”.

(The North American Whimbrel is now considered a different species, Numenius hudsonicus.)

High-hanging fruit bats

Birds are not the only warm-bodied flying objects. A sizable colony of Gambian Epauletted Fruit Bats, Epomophorus gambianus, lived in our lodge’s dining room roof. Before you shudder, here is our dining room: three 40-foot tall open thatched pavilions each large enough to take a dining table for 12:

The bats snoozed all day upside down in the rafters:

Most were at the very top, just visible above the windows, but a few roosted a little lower-down, so I could get closeups:

They are fruit (and nectar) bats, so they had no interest in tangling in our hair in a hunt for insects, let alone sucking our blood. They really look very much like small dogs:

Of course, they have wings instead of front legs, with little hands they use to cling on to the rafters.

Both sexes have white patches in front of their ears, and the males have tufted scent glands on their shoulders, not visible in my photos, which give them their “epaulette” name. The males have a wingspan of up to 20 inches. The females are a little smaller.

Unlike most bats, they do not use echo-location to find their food, but instead they depend on sight and smell. They have a complex social hierarchy (see below for more details) and can live as long as 28 years in captivity.

At dusk we would see them flying out to forage, and at our pre-dawn tea-and-biscuit rendezvous they would be returning for a good day’s sleep.

This short video gives you a closer look:

They’re found through a swathe of West and Central Africa, and are not endangered, though habitat loss and pesticides are a potential threat.

Wikipedia has a good description of their social organization, if you are curious for more:

The social behavior within fruit-bat camps does not stop at individual family groups. The whole colony is organized, with separate peripheral groups of immatures and non-breeding adults. The epauletted fruit bats travel in small groups of six to twenty bats. When the fruit bats are in flight, they remain together in long processions. The leaders often change, yet they retain the same direction of flight. (Mickleburgh)

They frequently sniff at each other’s scent glands to establish personal recognition. Which represents high levels of social organization. When one is shot down, they show great concern and gather round swooping low to inspect it; a sign of affinity rather than totally independent behaviour. They roost during the day in mango trees and bamboo reeds or other trees. The Gambian epauletted fruit bats hang upside down alone or in groups up to twenty. The species’ droppings support whole ecosystems of unique organisms, including bacteria useful in detoxifying wastes, and producing gasohol. This species feeds on nectar and fruits of many West African trees, presumably acting as pollinator and/or seed disperser. Some flowering trees depend on the bats for pollination. (Fenton)

The pack moves during sunset in large flocks from resting areas to feeding areas. To avoid predators, the bats will carry fruit away from the tree before eating. Over several nights bats may carry more than a ton of seeds from a single wild fig tree, dramatically increasing the number of seedlings that will survive in new locations. The fruit bats spend over half their lives roosting in various places. (Wilson)

On the outskirts of the camp, non-territorial males act as guards. They are alert to the slightest disturbance. They perform a visual inspection and either give a loud alarm signal, or remain still, keeping an eye open.[8]

Purple haze: herons again

I am used to living in places with a single common heron (Great Grey in England, Great Blue in Maine), plus maybe an egret or two. But The Gambia has many. Today’s focus is the Purple Heron, a graceful smallish heron that lurks in the mangrove roots and is often glimpsed when an evening sunbeam catches its paler head and neck:

The Purple heron, Ardea purpurea, is up to 90cm (3ft) tall. It lives year-round in sub-Saharan Arica (especially west Africa) , India and SE Asia, and some breed in Southern Europe.

When this one took off, I wasn’t quite ready, but the soft out-of-focus image looked so like a ghostly apparition of a ballerina that I embellished it:

In flight, it proceeded to lighten its load:

Then it soared off above the trees, with the sun behind it casting a shadow of its legs onto the underside of its wings:

It slowly straightened its legs

and settled into flight:

Azure aerobatics

The Abyssinian Roller, Coracias abyssinicus, is 30cm long plus 12cm streamers (elongated outer tail feathers, on both sexes):

In flight, it is even more spectacular:

You can see its tongue as it yawns.

And a little preening:

It swoops down on large insects on the ground. It likes open areas near woods, often tilled fields or village areas, and may have benefited from human habitation.

Rollers get their name from their courtship display, which involves diving towards the ground, rolling as they go. Just like a young pilot showing off. I have never managed to video this.

We also saw the less flamboyant but still handsome Blue-Bellied Roller, Coracias cyanogaster:

A Hawkish Stance

[This post is coming rather soon after the last, for reasons that will be apparent in the final paragraph!]

Two good-sized raptors that frequent the Gambia are the African Harrier, and the Lizard Buzzard. Let me introduce you.

A pair of African Harrier Hawks, Polyboroides typus, posed for us late one afternoon.

They have a wingspan of up to five feet. Unusually for hawks, they mostly hunt their prey by poking around in holes and crevices in trees. They are looking for nestlings, lizards, squirrels and the like. They have long flexibly jointed legs, with an intertarsal joint that is flexible through 190°–205°, meaning it can bend both backwards and forwards, which helps get into cavities.

They have a jaunty crest, and a bare orangey red face.

Those specialized legs are an interesting example of convergent evolution. The Crane Hawk, a unrelated New World species, has a similar hunting technique, and similar legs. I photographed this one in the Pantanal in Brazil in 2013.

The much smaller Lizard Buzzard, Kaupifalco monogrammicus, is a handsome bird with a distinctive single vertical black stripe down the centre of its throat,

like a skinny necktie* :

The Lizard Buzzard has a shortish stubby bill:

and a wingspan of about 2 1/2 feet.

Despite its name, it doesn’t eat only lizards; large insects make up a lot of its diet.

* Thankyou Brad Vernatter, General Director and CEO of Boston Lyric Opera, for this photo on the opening night of their wonderful Bluebeard’s Castle. If you are in Boston, it’s still on this weekend, March 25 and 26. Do go.

The last of their kind?

Although this was primarily a bird trip, we had other notable encounters.

The Western Red Colobus Monkey, Piliocolobus badius, is very, very, shy, and we were lucky to see it, but at a great distance. We circled around to try and get closer and with a better light, but they immediately dived for cover, and that was that.

I’m showing them to you anyway because they are officially classified as Endangered by the ICUN. There are no reliable population estimates, but their population is known to be decreasing. This subspecies, Temminck’s Red Colobus, may be especially endangered. Best estimates are a total of 2500 individuals, one of the largest populations being roughly where we were, in the Abuko Nature Reserve (Starin 2017).

There was a group of maybe four or five. This shot shows four, but I think there was one more.

At the top right was a charming family of three:

As you can see, the father is very aware of us, not surprisingly as we were creeping around loudly in the brush. The mother is more attentive to the baby, and of course seeing a baby is a very positive sign:

My photos don’t show it, but they have glorious long tails like this black-and-white colobus I saw in Uganda in 2014:

My final shot, of the solicitous parent restraining the baby, who is trying to explore its twiggy world:

PS The IUCN says: “.. red colobus monkeys (Piliocolobus spp.) are the most threatened group of African monkeys. According to the IUCN Red List of Threatened Species in 2020, every form of red colobus monkey is threatened with extinction, and 14 of the 18 taxa (>75%) are listed as Critically Endangered or Endangered. ” I feel privileged to have seen them, and saddened by their fragility.

Little Bee-Eater: small but fierce

Little Bee-eaters, Merops pusillus pusillus, are probably my favorite bee-eater. They’re the smallest bee-eater, but as Shakespeare said, “Though she be but little, she is fierce”.

Found all over Africa, and not endangered, they are diminutive jewels, inclined to perch in the open and low down, making them a photographer’s gift. The orange and green coloring is surprisingly good camouflage. They are frequently in pairs, though these two don’t seem to be getting along too well:

While we were there it was very hot, 39C or 100F, so to cool off they were diving into the pool. These dips also help rid them of parasites, and I suspect the chlorine might help too?

The dip was followed by a blowdry:

a rub-down:

a comb-through:

and a final styling:

The plumage is stunning, but so are the details, like the red eye and the sliver of bright blue supercilium.

They catch their prey on the wing, making about 40 sorties an hour, 30% of which are successful. Around 75% of their diet is bees and wasps, and the rest is other flying insects.

In this pair, one announced his imminent departure, and started to hunt:

Offering your prey to your mate is polite:

even if she doesn’t always seem interested:

But he never gave up: and her head is slowly turning towards him:

At this point I think something disturbed them, because I have no more photos!

PS Bees and wasps are tricky eating. Just as a Japanese sushi chef knows how to prepare poisonous fugu fish for safe consumption, the bee-eater knows how to get rid of both sting and venom by bashing and squeezing the bee on a branch first. This behavior has been shown to be innate. It takes about ten tries for a young bee-eater before the technique is mastered.

PPS Photographing birds diving into the pool is a matter of pure luck. The entire dive lasts perhaps one second, and you have no idea where in the pool it is heading for. So you basically photograph the pool surface, and then see what you’ve got afterwards!

Hooded and gowned: the Black Heron

A witch’s coven?? A gathering of gowned academics? An achingly chic Parisian fashion show?

No, just a group of Black Herons, looking for their lunch. The Black Heron, Egretta ardesaica, is a small heron 42-66 cm, weighing around 270-390 g. It is also known as the Black Egret. Here is a photo of it next to a Little Egret, Egretta garzetta.

It is famous for its ingenious and highly unusual hunting strategy. It spreads its wings over its head to create a dark tent over the water’s surface, reducing glare, and lulling the fish into a false sense of security. The neck plumes are used to complete the umbrella. Then it pounces.

The technique is called Canopy Feeding. At the same time, it stirs the water with one foot, presumably to rustle up some prey.

The wings are said to stay up for only 2-3 seconds at a time, but the ones we were watching seemed to stay there much longer. Below, on the right, is one heron with its wings half-way up into the feeding position.

They are elegant birds, with extra-wide flight feathers so that the canopy has no gaps:

Their feet are bright yellow, like the Little Egret’s. (Sorry about the blurry photo, the only one I caught with the feet visible.)

In German, it is called Glockenreiher, Bell Egret, I assume for the shape it makes when hooding. You can see it in action in this video, in a version immortalized by the BBC in a sketch from their comedy show Walk on the Wild Side.

The Black Heron is not endangered. Its range is mainly East Africa, and Madagascar (where populations are in worrying decline), and in West Africa it seems to prefer coastal areas.

PS I wanted to get closer to get better photos, but it meant walking out onto a patch of wetland where 15 minutes earlier I had seen this.

West African crocodile

So I didn’t. One fellow-traveler ventured out, and came back with all his toes and probably much better photos.

Finally, my own distant video of the entire group fishing: