Rather than doing the hard labor of raising their own chicks, cowbirds and other so - called brood
parasites lay their eggs in the nests of various unsuspecting songbirds, which then raise the foreign chicks as their own.
After a blood feast,
the parasite lays its eggs and the cycle starts all over again.
Mature
parasites lay their eggs within the lung channels.
Not exact matches
These birds are considered brood
parasites because they
lay eggs into the nests of other birds and throw out the host's
eggs to ensure there is no competition for food from the adoptive parents.
But Emory University's Jaap de Roode wondered if the choice might be related to a
parasite that's passed from mother to offspring, with fatal results: «What we do find is that the monarchs prefer to
lay their
eggs on the medicinal species when they are infected.
However, when they are not infected with the
parasite, they do not prefer this species over this one, they
lay their
eggs equally between these two species.
Birds that eventually rejected
parasite eggs still
laid an average - sized clutch of their own — even though the alien
eggs remained at the top of the nest for several critical days before being buried.
Now, new evidence suggests that today's slave snatchers started out as temporary
parasites — ants that
laid their
eggs in the nests of other species and then used those workers as part - time caregivers for their own offspring.
The brown - headed cowbird is a so - called brood
parasite that
lays its
eggs in other birds» nests, thereby letting other species do all the heavy lifting of chick rearing.
Varroa mites are external
parasites that
lay eggs in the brood cells within the hive and emerge attached to the host when the bee hatches out of its cell.
Parasites like phorid flies want to
lay their
eggs in the ants, while other ants merely want to steal the valuable real estate.
Fresh - water snails living in certain tropical regions of the world release the larval forms of the schistosome
parasite, which penetrate the skin, migrate through the body, and develop into adults that
lay eggs that cause the disease.
Parasites can be incredibly frustrating because any parasites you kill have laid eggs, which hatch in a few weeks and the cycle begi
Parasites can be incredibly frustrating because any
parasites you kill have laid eggs, which hatch in a few weeks and the cycle begi
parasites you kill have
laid eggs, which hatch in a few weeks and the cycle begins again.
Advantage II kills fleas within 12 hours of application, so the
parasites die before they can
lay eggs.
The roundworm is a patient, persistent
parasite that can
lay up to 100,000
eggs in a single day.1 Once an
egg is accidentally ingested by a dog, the roundworm hatches and makes its way through the body to an ideal feeding ground, the intestine.
Veterinarians at the humane society say the
parasite is found outside rabbit holes or nests where the
eggs of the bot fly are
laid.
Roundworms are another particularly difficult
parasite to eliminate in that they
lay extreme numbers of
eggs that can survive outside the body of a host in soil for as long as ten years.
Heartworms do not
lay eggs like other worm
parasites; instead they give live birth and the baby worms are called Microfilariae.
One of these nasty
parasites can
lay up to 20
eggs at a time and at their worse, they can
lay eggs every day!
K9 Advantix II kills fleas within 12 hours of application, so the
parasites die before they can
lay eggs.
Flea control is critical to maintaining good pet health, as fleas can cause anemia and allergic dermatitis, and can also transmit bacteria and other
parasites to dogs and cats.2 The success or failure of products for flea control depend on a product's ability to suppress flea reproduction for the duration of the treatment period.3, 4 A single female flea can
lay up to 50
eggs per day.5
The
eggs are
laid either in water or on land, and the newly hatched larvae are free - living, as are the adults that also emerge from the
parasites to
lay eggs.
Cuckoo birds have long been seen as
parasites, because they
lay their
eggs in the nests of other birds.