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Há 4 dias · Each species of bronze-cuckoo closely matches the appearance of their host's chicks, fooling the host parents into accepting the cuckoo. The study shows how these interactions can cause new...
Há 3 dias · So we developed a non-destructive method for extracting DNA from the shells of tiny cuckoo eggs (2.5cm long), which allowed us to sample museum egg specimens that have been collected over many ...
Há 4 dias · Bronze-cuckoos lay their eggs in the nests of small songbirds. Soon after the cuckoo chick hatches, it pushes the host’s eggs out of the nest. The host not only loses all its own eggs, but spends several weeks rearing the cuckoo, which takes up valuable time when it could be breeding itself.
Há 4 dias · The study shows how these interactions can cause new species to arise when a cuckoo species exploits several different hosts. If chicks of each host species have a distinct appearance, and hosts reject odd-looking nestlings, then the cuckoo species diverges into separate genetic lineages, each mimicking the chicks of its favoured host.
Há 4 dias · We reveal the microevolutionary process underlying speciation: Hosts reject cuckoo nestlings, which selects for mimetic cuckoo nestling morphology. Where cuckoos exploit multiple hosts, selection for mimicry drives genetic and phenotypic divergence corresponding to host preference, even in sympatry.
Há 3 dias · Once hatched, cuckoo chicks grow faster than the host species chicks and typically evict the eggs or chicks of the host species from the nest. In response, Langmore said hosts have learned to ...
Há 1 dia · To stimulate economic prosperity in the poor region around Furtwangen (close to the Danube river springs), the Grand Duchy of Baden commissioned Robert Gerwig to set up a watchmaking school, mid-19 th century, which should scale up the production of cuckoo clocks. The school still exists, bearing his name.
