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Gull eggs are usually (but not always) larger than any size of chicken egg; for example, a herring-gull egg typically weighs about 85 g (3.0 oz). [4] [a] One source states that a generalized gull's egg is approximately twice the size of a chicken's egg. [5] Egging is the prehistoric practice of foraging wild-bird eggs.
Ostrich eggs in a nest on a farm. The egg of the ostrich (genus Struthio) is the largest of any living bird (being exceeded in size by those of the extinct elephant bird genus Aepyornis). The shell has a long history of use by humans as a container and for decorative artwork, including beads. The eggs are not commonly eaten.
Humans have a long history of eating eggs, both wild bird eggs and farm-raised bird eggs. [citation needed] Brood parasitism occurs in birds when one species lays its eggs in the nest of another. In some cases, the host's eggs are removed or eaten by the female, or expelled by her chick.
A biologist at Midway Atoll National Wildlife Refuge noted that Wisdom the bird still 'seems to still have the energy and instincts for raising another chick'
Oology (/ oʊ ˈ ɒ l ə dʒ i /; [1] also oölogy) is a branch of ornithology studying bird eggs, nests and breeding behaviour. The word is derived from the Greek oion, meaning egg. Oology can also refer to the hobby of collecting wild birds' eggs, sometimes called egg collecting, birdnesting or egging, which is now illegal in many ...
Reptile eggs, bird eggs, and monotreme eggs are laid out of water and are surrounded by a protective shell, either flexible or inflexible. Eggs laid on land or in nests are usually kept within a warm and favorable temperature range while the embryo grows. When the embryo is adequately developed it hatches, i.e., breaks out of the egg's shell.
The world's oldest known wild bird has laid an egg at the approximate age of 74, US biologists say. Wisdom, a Laysan albatross, was filmed by the US Fish and Wildlife Service (USFWS) at the Midway ...
While many reptiles lay eggs with flexible, calcified eggshells, there are some that lay hard eggs. Eggs laid by snakes generally have leathery shells which often adhere to one another. Depending on the species, turtles and tortoises lay hard or soft eggs. Several species lay eggs which are nearly indistinguishable from bird eggs. [citation needed]