1992) Rejection of cuckoo eggs
in relation to host age: a possible evolutionary equilibrium, Behavioral Ecology, ISBE, pp.
If the value of cuckoo egg
is superior to chosen one, replace the random nest with cuckoo egg
Also, the so-called guest cuckoo eggs
hatch much earlier than the host eggs.
In other words, by the time the cuckoo egg
is laid, it has had 18 to 24 hours of internal incubation at 40 degrees Centigrade and hatches 31 hours ahead of any host egg laid at the same time.
Soler investigated that question by removing the cuckoo eggs
from a num- ber of magpie nests and rechecking the sites several days later.
The response of magpies to parasitized nests was classified as (1) acceptance (the cuckoo egg
remained in the nest between consecutive nest visits), (2) ejection (the cuckoo egg
disappeared between two nest visits), or (3) abandonment (the nest was found containing cold eggs).
Reed warblers live with the threat that a cuckoo will infiltrate their nest, remove one of their eggs, replace it with a cuckoo egg
, and leave cuckoo chicks to be raised by the unsuspecting reed warblers.
Some victimized species catch the fraud in the egg stage and roll the cuckoo egg
out of the nest.
Once a clandestinely laid cuckoo egg
hatches in a reed warbler nest, the chick evicts its native nestmates.
It is worth mentioning that cuckoo eggs
may be discovered by the host birds.
It also provides excellent habitat for other bird species, the meadow pipits and dunnocks, both of which become unsuspecting foster parents to cuckoo eggs
In CS method, cuckoo eggs
represent solutions for desired objective function.