Parasite arms race spurs color change in bird eggs

The eggs laid by two African bird species have evolved different color patterns over a period of just 40 years, according to new research published in The American Naturalist. The quick change appears to be driven by an unwanted ...

Cuckoo chicks in Zebra finches

(PhysOrg.com) -- Some female zebra finches foist a part of their eggs on their neighbours. Scientists of the Max Planck Institute for Ornithology in Seewiesen discovered that in every fifth nest there is one egg that is not ...

Magpie parents know a baby cuckoo when they see one

Cuckoos that lay their eggs in the nest of a magpie so that their chicks can be raised by the latter better hope that their young are not raised together with other magpies. The chances of cuckoo fledglings raised in mixed ...

Bad parenting could give zebra finches the evolutionary edge

Species must reproduce to survive, and animals have found unique ways of achieving this. For some, including us, it seems as though producing a few offspring that require extended care is the best strategy. For others, such ...

Cuckoos hide from each other using 'cryptic' eggs

Cuckoos aren't the kind of parents you'd want. They never raise their young ones, leaving that job to other birds. They achieve this by laying their eggs in other expectant birds' nests, who treat them as their own and take ...

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