Perhaps, the reason is to ensure enough food supply for their own family and joint protection against enemies.
For long, it was believed that this color was designed to imitate spots of sun on the leaves and so confuse egg-thieves, but recent studies have rejected this theory, saying that the color of the eggs makes little difference because predators usually find the nest before they have seen the eggs. Usually both partners share the task, but in some species females do it single-handedly and only on rare occasions, the male alone performs this tedious job.
Reasoning given by scientists in this case is originally they used to lay eggs in the open but gradually at some point of time they adapted themselves to the habit of hole-nesting.
In, other words where their rolling will not pose a hazard of falling down. This strategy protects them from predatory fishes like pike and catfishes that eat them. Read video transcript Footage of a moorhen in wetland habitat.
The winter can be a tough time of year for birds. There are birds that neither build any nest nor incubate even their own eggs, instead they deposit their eggs in the nest of other species; this phenomenon is known as social parasitism. Birds that mate in the water like ducks, geese and swans also have penises. Report Abuse.
Usually birds build new nests before every breeding season, but in some species, the same nest is used for a number of years, adapting or adding something to it every year. When the egg passes through oviduct, it receives colors from pigments secreted by cells situated in the walls of the oviduct, particularly of the uterus. In the same way they show different kinds of behavior all through their breeding period and in every aspect of it.
What they eat: One that seems most reasonable is that female always selects robust, healthy and strong male to breed with so that the young ones thus produced should also be strong enough to face the challenges of life.
I would guess that they are called chicks. Share this Facebook Facebook Created with Sketch.
Since the eggs of these birds remain in the darkness of holes and cavities they have no need for cryptic coloring, however, there are some exceptions, like titmice, among the hole-nesters who do have colored eggs. From time to time, moorhens will come on to land, walking around with their oversized green feet, the toes sporting small flaps of skin called lobes that help them paddle once they are back in their usual watery home.