The young bird, beginning with the earliest stage of development within the egg until it hatches.
A chemical that produces colour. There are three pigments responsible for all of the colours, both background and markings, that we see on eggs: protoporphyrin, biliverdin and the ...
Refers to the holes or channels through an eggshell; allows the exchange of gas and water vapour between the egg and its environment.
A bird that lays its eggs in the nest of another (host) bird, freeing the parasite from the duties of incubation and rearing.
A chemical designed to kill pests. DDT is one pesticide used extensively in the past.
The main nutritive portion of the egg. It is spherical in shape and light yellow to orange in colour.
A chamber that provides nourishment and protection for the growth and development of the embryo inside it.
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Collection of reproductive structures found in flowering plants.
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