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The common blackbird is one of a number of species which has unihemispheric slow-wave sleep. One hemisphere of the brain is effectively asleep, while a low-voltage EEG, characteristic of wakefulness, is present in the other. The benefit of this is that the bird can rest in areas of high predation or during long migratory flights, but still ...
An annual International Dawn Chorus Day is held on the first Sunday in May [6] when the public are encouraged to rise early to listen to bird song at organised events. The first ever was held at Moseley Bog in Birmingham, England, in 1987, organized by the Urban Wildlife Trust (now The Wildlife Trust for Birmingham and the Black Country).
In birds with song repertoires, individuals may share the same song type and use these song types for more complex communication. [23] Some birds will respond to a shared song type with a song-type match (i.e. with the same song type). [24] This may be an aggressive signal; however, results are mixed. [23]
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For song learning to occur properly, young birds must be able to hear and refine their vocal productions, and birds deafened before the development of subsong do not learn to produce normal adult song. [34] The sensitive period in which birds must be exposed to song tutoring varies across species, but typically occurs within the first year of ...
Music video The video, performed by Drew Colby, uses shadowgraphy or "hand shadow puppetry" to show two birds struggling to find food for their chicks. Colby used hand shadows to produce the images of birds, spiders and landscapes, which were there composited together digitally. [6]
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Sleeping on one side with the face pressed into a pillow can also cause temporary lines or marks in the skin. While these "sleep lines" will go away, they can be a nuisance. While these "sleep ...