Latest American Redstart Stories
Instinct and the annual increase of daylight hours have long been thought to be the triggers for birds to begin their spring migration.
The results of genetic studies on migratory birds substantiate the theory that in the case of a continued global warming, and within only a few generations, migratory birds will - subject to strong selection and microevolution - at first begin to fly shorter distances and at a later stage, stop migrating, and will thus become so-called "residents".
The astonishing diversity of avian movement patterns, reproductive tactics, and survival rates creates rich opportunities for study, but also presents enormous challenges for explaining variation among life-history traits and dispersal.
The American Redstart, Setophaga ruticilla, is a New World warbler. It breeds in North America across southern Canada and the eastern USA. Being a migratory bird, it winters in Central America, the West Indies and northern South America. It has been spotted in Western Europe on very rare occasions. This species is unrelated to the Old World redstarts, but gets its name from the male's red tail, start being an old word for tail. The breeding male is unmistakable. It has jet black...
- The act of sweetening by admixture of some saccharine substance.