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6 Blackcap - Evolution in Time Lapse |

Climate change, coincidences and human feeding instincts could have ushered in the formation of a new bird species. Because blackcaps (Sylvia atricapilla) It is possible that they are currently splitting into two species - and this is due to a different migration behavior: some of the Central European blackcaps have been flying west to the British Isles since the 1960s, where they survive thanks to increasingly mild winters and bird feeders, while others have Population continues the longer route to the southwest to the Mediterranean. In spring, the island hibernators arrive earlier in the Central European breeding areas, where they mate earlier and exclusively with other arrivals from the northwest. Although both representatives continue to exist side by side in the same habitats, they no longer mix. In this way they differ more genetically than black warblers, which nest more than 800 kilometers apart, but survive the cold season in Spain. The two can be distinguished based on physical characteristics: Those who fly to Great Britain have more rounded wings, which are easier to maneuver, but which are unsuitable for longer flights. In return, the Mediterranean hibernators have thicker and shorter beaks with which they can eat the large fruits that are also available at the destination in winter.