You can tell that I’m not a natural born ornithologist by the fact that my first question after taking the featured photo was “What’s that bush with the white flowers?” Everyone else in the jeep was babbling about greater, lesser, and common whitethroats. The Family gave me a look which would have melted the lens in her binoculars if she’d not had to take it off her eyes in order to look at me. As a peace offering I said “Definitely a common whitethroat. See.” She looked at the photo I’d taken and said “Okay. At least you go it.” It was at extreme range, and any attempt to zoom made it a little fuzzy. October took a look and said excitedly “Clear eye ring. Obviously Curruca communis.” Wisdom looked, but reserved her judgement. I waited until I could search for a good explanation of the difference between the common whitethroat (Curruca communis, also greater whitethroat) and the lesser whitethroat (Curruca curruca). There is one, and it is worth reading.
Why the excitement? Because this is another bird of passage in India. It spends its summers breeding in Europe (every single country, including Iceland), south across Gibralatar to Morocco, and eastward in an arc over central Asia right up to Mongolia. In winter it migrated to Africa. The western population crosses the Mediterranean and the Sahara to winter in a narrow band across sub-Saharan Africa. The eastern population crosses either the Mediterranean or the central desert land (the complex of the Gobi, Thar and Arab deserts) to winter in the great rift valley and the surrounding parts of eastern Africa. For a short while the greatest density of these birds in the east is in the Rann of Kutch. We had timed our trip to catch this unique sight.
A new longevity record has been registered for the Common Whitethroat Curruca communis, with a bird recaptured in Italy 18 years and 11 months from the date of ringing. This exceeds the previous longevity record by almost 10 years.Roberto Pollo
C. communis is very well-studied bird. Its population crashed during the great Sahel drought of the 1970s and 80s (those with long memories may remember the Live Aid concerts of 1985 in response). But the species is said to be well on the way to recovery now. I always wonder though what this means. The genetic diversity in the current population must be much reduced compared to what it was before. Would this have consequences in the coming years of a warm earth? There is evidence that the evolution and speciation of warblers was strongly influenced by climatic changes. Perhaps we are at the beginning of a burst of such speciation.
Unfortunately I got sidetracked by the interests of people around me and never got back to the question that interested me in the first place.