When that happens they all simultaneously mature, emerge, mate, lay eggs if female, and then die.
You can import monarchs, but they won't lay eggs because there's nothing for their progeny to eat.
After they mate, the females lay eggs in trees and the adults die.
Indeed, both males and females can mate and lay eggs with up to seven different partners in one season.
She observed a group of wild swallows, allowed them to pair up and lay eggs and then moved in.
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He said wet weather makes it harder for the adults to lay eggs, and also washes any larvae away before it can hatch.
But asexual ants of other species either rely on one or a few individuals to lay eggs, or else only the younger ants do it.
The butterfly rearing process starts with farmers catching a few female butterflies and transferring them to an enclosure where they can lay eggs on host plants.
Lake sturgeon, he said, once populated the river thanks to rocks and boulders that created spots to lay eggs in well-oxygenated water that was safe from other predators.
The clothing fibers carry fragrance, perspiration, hair, invisible food stains, all of which over time can turn into protein that attracts insects that lay eggs and will chew up your clothes.
Placental mammals - as opposed to the kind that lay eggs, such as the platypus, or carry young in pouches, such as the kangaroo - are an extraordinarily diverse group of animals with more than 5, 000 species today.
Dr Jaisson reckons that the enormous size of the eggs is the main reason why each individual can only lay two eggs at a time she probably does not have the capacity to lay more.
Charles Moore once told me that one in three male swordfish lay female eggs.
Female cicadas have to be careful when they choose a tree in which to lay their eggs.
Cuckoos lay their eggs in the nests of other species including dunnocks, reed warblers and meadow pipits.
But again on average only one of those females is permitted by the male to lay her eggs in the nest.
Each year, the birds lay their eggs near the site of an old swimming pool on Longsands beach in Tynemouth.
The theory is simple: find fish which like eating mosquito larvae and put them in ponds, rivers and wells where mosquitoes lay their eggs.
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He also has something to trade, which should allow him to be choosy about which females he allows to lay their eggs in his nest.
The journey takes them, for instance, to Taganak, one of the Turtle Islands, where the creatures (oblivious to such niceties as national boundaries) heave themselves ashore to lay their eggs.
Birds were given different colors, squawks and abilities such as extra density, acceleration and the power to lay explosive eggs in the air before winging off their parabolas from the counterforce of laying eggs.
Researchers have hope for tiny parasitic wasps from Asia, which scientists are studying to see if they can be hungrily effective if introduced in the U.S. The wasps lay their eggs within the stink bugs' own egg masses.
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Female sturgeon don't become sexually mature until their 20s and spawn about every four years, so the spawning season, in which they surface from the depths to lay their eggs on rocky shores, is an extremely important time for the species.
Because peregrine falcons don't build nests but lay their eggs on a flat surface, officials with the Port Authority of New York and New Jersey started protecting the eggs several years ago by building nesting boxes on the George Washington and the other bridges the authority operates.
Beneath the first of the Sisters, my eye was caught by a clutch of grey flints that lay together like eggs right at the foot of the cliff.
This Internet goose is just starting to lay its golden eggs.
Females can lay thousands of eggs at a time.
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Remarkably, though, when it comes time to lay their own eggs, the female of the species will typically cross the ocean to return to precisely the same beach where she may have hatched 15 years earlier.
Backyard farmers focus on texture and taste, and on new breeds of chicken known as Easter Eggers, that lay blue, pink or violet eggs.
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