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杜鹃最为人熟知的特性是孵卵寄生性。这种特性见于杜鹃亚科的所有种类和地鹃亚科的3个种类,即产卵于某些种鸟的巢中,靠养父母孵化和育雏。杜鹃亚科的47种有不同的适应性以增加幼雏的成活率,如杜鹃的卵形似寄主的卵(拟态),因此减少寄主将它抛弃的机会;杜鹃成鸟会移走寄主的一个或更多的卵,以免被寄主看出卵数的增加,又减少了寄主幼雏的竞争;杜鹃幼雏会将同巢的寄主的卵和幼雏推出巢外。某些杜鹃的外形和行为类似鹰属(Accipiter),寄主见之害怕,杜鹃从而能不受干扰地接近寄主的巢。因此许多人给杜鹃安上了“恶
The most well-known feature of rhododendrons is hatching parasitism. This characteristic is found in all species of Rhododendron and subfamily Rhododendron and three species of Rhododendron, ie spawning in the nest of some species of birds, hatching and brooding by adoptive parents. The 47 species of Rhododendron subfamily have different adaptations to increase the survival rate of young chicks. Eg the rhododendrons ovate like host eggs (mimicry), thus reducing the chance that the host will discard them; rhododendrons will remove one or More eggs, in order to avoid the host to see the increase in the number of eggs, but also reduce the competition of the host young chicks; cuckoo chicks will be the same nest host eggs and chicks pushed out of the nest. Some of the rhododendrons, like the Accipiter in shape and behavior, host fear that the rhododendrons approach undisturbed access to the host’s nest. So many people put cuckoo on the ”evil