This story is part of a fairy tale titled 'The Nightingale and the Rose' from a collection of stories for children, [The Happy Prince and Other Stories], by Oscar Wilde first published in 1888. Nightingales are so named because they frequently sing at night as well as during the day. This is why its name includes "night" in several languages.
Only unpaired males sing regularly at night, and the song serves to attract a mate. Its song is particularly noticeable at night because few other birds are singing. This is nightingale's differentiation strategy to increase the probability of mating success. We have to learn from the bird nightingale singing at night.
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