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As we move from Spain towards the east however, it starts getting interesting as soon as we reach Italy. Italy has an almost endemic … well … “form” of Sparrow, the Italian Sparrow , whose taxonomic affinities and rank have been a matter of dispute ever since scientists started to think about it.
It seems that the Red-billed Leiothrix can be vocally dominant (it accounts for 37% of an entire bird community soundscape in northern Italy) and can influence the singing behavior, particularly of native Eurasian Blackcaps and European Robins (in Portugal and Italy). In one group, they added a blue egg to their nests.
Dates of first arrival listed by Schorger (1966) are: Italy 1520, Germany 1530, France 1538, England 1541, Denmark and Norway 1550, Sweden 1556. Early research suggested that “Fragmented distributions and population bottlenecks due to human activities appear to have increased genetic differentiation among populations” (Leberg 1991).
It can take a bit of research to figure these notes out, especially when they are citing taxonomic differences (Riparian [Blackish] Antbird, for example, is treated differently in three of the four taxonomic systems), but it is tremendously helpful just to know that there is an issue to be researched.
Europe… with such low herp diversity the locals split any sub-population of a species that occurs on either the Iberian Peninsula or Italy as a new species just to make them feel better out themselves, naturally is the continent that rose to the top of my trip list. Either that or having family friends in Germany.
We now know a lot more, and the following information is largely based on the excellent work of our local bird data compiler Armin Konrad , who was amongst the first to notice the die-off in the first place and was also instrumental in coordinating the surveys and research that finally led to the identification of the culprit!
It’s a book about ornithological research yet reads almost like a novel. Kroodsma identifies specific birdsong puzzles about which no researcher yet has answers, including problems where diligent amateurs can make discoveries. Aglianico is a rustic and savory red wine from Southern Italy made from a venerable grape of the same name.
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