Recent Examples of parasitism from the Web
Hauber studies a behavior known as brood parasitism, in which birds lay eggs in the nests of other species, leaving the unwitting foster parents to rear their chicks.
As to why warblers and other victims of brood parasitism fail to retaliate by themselves evolving thicker eggshells, and thus faster-hatching young, that is unclear.
This looks like a classic case of convergent evolution, but no one has been able to prove the point by demonstrating a benefit derived from it that is connected directly with brood parasitism.
Such brood parasitism has arisen independently at least three times, in the groups known as cuckoos, cowbirds and honeyguides.
The cowbird practice of brood parasitism can, and has, had serious implications for other native birds.
After all, such complex parasitism is serious evolutionary trickery.
Some endangered or threatened species populations have been adversely affected by cowbird parasitism to the point where cowbird trapping programs have been implemented.
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First Known Use of parasitism
Learn More about parasitism
Britannica.com: Encyclopedia article about parasitism
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