The Processionary Caterpillars are out in full force again this autumn, providing easy pickings for this female African Emerald Cuckoo.
The caterpillars are the larvae of the moth named Reticulate Bagnet (Anaphe reticulata) and I have written about them and their silk road and their perfect host the Cross-berry tree (Grewia occidentalis) on which they feed and, from the point of view of the cuckoo, obligingly cluster.
I have noticed this cuckoo – if indeed it is the same one each time – on several mornings, quietly helping herself to caterpillars, carefully picking off one at a time. Although she is not as striking looking at the truly emerald green and yellow male African Emerald Cuckoo, I rather like her understated iridescence and beautiful barring.
The emerald green on the female African Emerald Cuckoo is mostly limited to the shoulders, back and top of the wings, on feathers that are delicately barred with beige and brown
The barring on her underside creates an almost marbled effect
The colours are set off by pure white and fluffy pantaloons. To compare her to the more glamorous male African Emerald Cuckoo click on this link to the Perfect Host
Each caterpillar is twirled and softened up before being swallowed whole, hairy spikes and all. The Bird Ecology Study Group reports that when preparing a caterpillar for eating, the bird makes sure that it expels the caterpillar’s gut contents that are potentially indigestible or toxic. As for swallowing the hairs, these form a mat in the stomach and the hairs can then be regurgitated as pellets. Caterpillars of various kinds form the basis of the diet of the African Emerald Cuckoo. For more on the African Emerald Cuckoo and other cuckoos that visit our garden, see the earlier post The cuckoo has landed.
This caterpillar is being deftly prepared for eating prior to being swallowed
And here one has just disappeared down the hatch
Swallowing the last of four caterpillars eaten during this particular meal
Until now, I have not featured videos on naturebackin.com, but as I have captured some video footage of this cuckoo picking off, twirling and eating caterpillars in the Cross-berry tree in our garden, I thought I would share it here.
I am considering including video clips in future posts? I would be interested to know if you think this is a good idea?
Source: Bird Ecology Study Group. 2006. Caterpillars and Birds. http://www.besgroup.org/2006/02/23/caterpillars-and-birds/
Posted by Carol
June 5, 2018 at 4:06 pm
Wow theses cuckoos certainly have an understated beauty in their appearance which can be seen in the close up picture. But their love for caterpillars is certainly not subdued!!
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June 6, 2018 at 8:00 pm
True in both respects, Abrie 🙂
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June 2, 2018 at 6:01 pm
Gorgeous bird! The photos are stunning as ever, carol, but the video really adds another layer. If you have the time to include more videos, I would certainly make time to watch and enjoy them 🙂
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June 2, 2018 at 7:59 pm
Thanks very much Sandra. Am giving the videos more thought.
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June 1, 2018 at 8:45 pm
Fascinating! And I think including videos would be a good idea.
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June 2, 2018 at 7:58 pm
Thanks so much Leya.
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June 1, 2018 at 3:50 pm
We get these caterpillars in France and they are not popular …. they are quite venomous and they also attack the trees. All that said, I love them …. I find them absolutely mesmerising to watch and your fascinating account of their habits has opened my eyes even more. The plumage on that cuckoo is profoundly beautiful.
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June 6, 2018 at 7:55 pm
We are lucky the processionary caterpillars here are not so toxic. They are fascinating to watch. The plumage of the more understated femaie Emerald Cuckoo is subtle and beautiful.
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June 1, 2018 at 8:46 am
Once again, beautiful photography and descriptions and most dfinately thumbs up for more videos! Especially of the birds
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June 1, 2018 at 12:59 pm
Thank you very much Suzette. I will be reviewing my small collection of video clips and perhaps be tempted to try taking a few more. So different to taking stills though.
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June 1, 2018 at 8:30 am
The photos and information followed by the video that showed everything was fabulous!
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June 1, 2018 at 12:56 pm
Thanks Liz for the lovely compliment 🙂
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June 1, 2018 at 7:37 am
The only processionaries I know are the Pine Processionaries in France. Very toxic to curious children and dogs. And they were a spring time phenomenon. And if you have videos like this to share, please do. Fascinating.
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June 1, 2018 at 12:53 pm
I am grateful our processionaries are not hugely toxic like that. We see the moths in evidence in summer here. And thanks, I will be considering using more videos when they seem appropriate – requires a change in mindset though!
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June 1, 2018 at 5:53 am
Adore Processionary caterpillars! Such fabulous photos of the cuckoos too.
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June 1, 2018 at 12:45 pm
Thanks Nikki. The caterpillars are fascinating and somehow the word crazy comes to mind 🙂
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June 1, 2018 at 4:03 am
Great photos and story. Love the detail on the wings.
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June 1, 2018 at 12:42 pm
Thanks Graham, Yes, I love that detail too.
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June 1, 2018 at 2:14 am
What a wonderful opportunity to study a bird that is normally shy and elusive, Carol!
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June 1, 2018 at 12:42 pm
Thank you. Yes indeed, it is usually an elusive bird, but the caterpillar buffet gave it an unusual nonchalance 🙂
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May 31, 2018 at 11:41 pm
Love your cuckoo shots and thumbs up to the video, too!
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June 1, 2018 at 12:39 pm
Thank you Sandy!
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June 1, 2018 at 3:00 pm
You are welcome.
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May 31, 2018 at 11:39 pm
What fascinating birds! I enjoyed learning about their habits.I think you should include videos if/when appropriate. That’s not to say I’ll always find the time to watch them, as much as I might like to. There is that dilemma. 🙂
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June 1, 2018 at 12:39 pm
Thanks Gunta. I so understand what you say about finding the time! There is always so much to juggle. The enjoyable things,, such as the half-read book next to my bed and the many blogs I love to visit, somehow keep on getting bumped down my list of things to be done, All too often the less enjoyable things I have to do remain at the top!
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May 31, 2018 at 10:17 pm
Fascinating! I think including a video is an excellent idea as it gives your readers a clear view to match your description.
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June 1, 2018 at 12:33 pm
Thank you Jane.
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May 31, 2018 at 9:41 pm
Fascinating how it picks them up by the tail end first… and yes to more videos!
What is interesting is that our local cuckoo (on the other side of the earth) similarly eats webworms, of which we are experiencing a bumper year. There are not enough birds to eat them, they are literally everywhere and pretty yucky when squashed. 😦
Sadly, our cuckoos are in decline. They are shy, but I was lucky enough to hear (and see!) one down by our river the other night, although I have not heard it since. I tend to hear them more in late summer for some reason. If interested: https://www.allaboutbirds.org/guide/Black-billed_Cuckoo
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June 1, 2018 at 12:14 pm
Thanks for the link Eliza. Was interested to see that the Black-billed Cuckoo is not routinely a brood parasite as our cuckoo visitors are. How interesting too about the feet – now I know why I thought there was something a bit odd about the Emerald Cuckoos feet! Are the reasons for the decline of cuckoos in your area known? I suppose the usual problems such as habitat loss are factors? And thanks, I will be considering more videos in future.
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June 1, 2018 at 2:39 pm
Being shy and in need of undeveloped land, I’d surmise habitat loss is a big part of the decline. While we have reforestation in our corner of the Northeast, south of us is one long stretch of suburbia. It’s a wonder any migrants survive that gauntlet.
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June 6, 2018 at 7:50 pm
Very sad. I do wish that suburban areas could be designed and developed in such a was as to provide at least wildlife-friendly corridors, and also many suburban gardens could be planted and maintained so as to provide pockets of refuge and sustenance for many birds and other creatures.
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June 6, 2018 at 9:12 pm
Agreed. I would love to see our Interstate Highway System median strips mowed only once a year to allow wild meadows to develop. What a difference that would make.
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May 31, 2018 at 9:32 pm
Wow, what an interesting observation! Beautifully captured. I loved the video, too. I’d definitely enjoy watching more video clips from you. It bring in another dimension – seeing the movement and hearing the sounds from the surrounding environment was wonderful!
-Emma
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June 1, 2018 at 12:04 pm
Thank you Emma. It has been a special thing to see, and fortunate to be able to get some photos too. I will be looking through my small stash of video clips 🙂
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May 31, 2018 at 9:28 pm
Superb, and the video was smashing. Yes, go for it!
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June 1, 2018 at 12:02 pm
Thanks so much Ark, and for the encouragement.
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May 31, 2018 at 9:21 pm
What a wonderfully interesting read! Not ever having seen an African Emerald Cuckoo, I enjoyed your video – and the sound of water in the background 🙂
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June 1, 2018 at 12:02 pm
Thanks Anne. Usually these cuckoos are hard to see, but this one was lured by such a bunch of yummy caterpillars! Thanks for letting me know you liked the video.
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