Scientists crack egg forging evolutionary puzzle

12 April 2022

A genetic study of Zambian cuckoo finches has solved one of nature’s biggest criminal cases, an egg forgery scandal two million years in the making. Its findings suggest that the victims of this fraud may now be gaining the upper hand.

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Parasitic purple indigo bird

Cheating birds mimic host nestlings to deceive foster parents

02 October 2020

̽»¨Ö±²¥common cuckoo is known for its deceitful nesting behaviour – by laying eggs in the nests of other bird species, it fools host parents into rearing cuckoo chicks alongside their own. While cuckoos mimic their host’s eggs, new research has revealed that a group of parasitic finch species in Africa have evolved to mimic their host’s chicks - and with astonishing accuracy.

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Yao honey-hunter Orlando Yassene holds a male greater honeyguide temporarily captured for research in the Niassa National Reserve, Mozambique.

How humans and wild birds collaborate to get precious resources of honey and wax

22 July 2016

By following honeyguides, a species of bird, people in Africa are able to locate bees’ nests to harvest honey.  Research now reveals that humans use special calls to solicit the help of honeyguides and that honeyguides actively recruit appropriate human partners. This relationship is a rare example of cooperation between humans and free-living animals.

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African greater honeyguide

Natural born killers

07 September 2011

Newly hatched chicks of African honeyguide birds bite to death their foster siblings to eliminate competition.

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Image shows a variety of cuckoo finches each adapted to mimic a different host species or colour morph

Biological arms races in birds

13 April 2011

New research reveals how biological arms races between cuckoos and host birds can escalate into a competition between the host evolving new, unique egg patterns (or ‘signatures’) and the parasite new forgeries.

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