Tag: "nest" at biology news

Despite darkness, nocturnal bees learn visual landmarks while foraging at night

...ts, Megalopta visually learns landmarks around the nest entrance prior to foraging and uses these landmarks to locate the nest upon return. The researchers found that if landmarks were moved to a nearby site while the bee was a...

Parasitic cowbirds thrive with a less ruthless strategy than cuckoos

...ing thrives by muscling its host's eggs out of the nest and hogging all the food, a new study by biologist...wbird chick actually grows faster when sharing the nest and food with two host chicks than it does when all alone in the nest. "The cowbird alone is incapab...

A changing landscape may have dire implications for birds

...ts. "Roads provide access and increased edges that nest predators including jays and crows use," Pidgeon says, "and we know from the work of others that an increase in predation accompanies an increase in housing density" as the domesticated animals that accompany humans, cats and dogs in particular, exac...

Hormone helps fish to mate, may affect human hearing

...nt call that says, essentially: "I have prepared a nest under a rock in shallow water, so deposit your eggs for me to fertilize, and together we'll make beautiful small fry." Altering steroid hormone levels did not change the reproductive status of the females; the eggs they carried were still immature a...

Birds use herbs to protect their nests

...d plant materials that parent birds bring into the nest have a sufficient concentration of antimicrobial c...ann Ichida. To find out if plants brought into the nest might prevent disease, Ichida and colleagues tested twelve different volatile plant materials agains...

Male susceptibility to disease may play role in evolution of insect societies

... nest. But they rarely are allowed outside of the nest and they do not forage for food or building materials, activities that might expose them to disease pathogens. "If males were exposed to disease we would expect females to avoid, and possibly to attack and kill those males to minimize disease bein...

Penguins ingest mollusk shells to obtain calcium for thicker eggshells

...calcium used to form eggshells. Penguins typically nest on hard surfaces near coastlines and, if soil cond...ker shells are important for penguins, which often nest in large colonies. Boersma has documented that, particularly in more densely populated colonies, per...

Using science to restore habitat for declining species

... sticky resin that deters snakes from entering the nest cavity. One of Conner's many studies suggests that the socially dominant breeding male can actually determine which tree will produce the most resin. Conner also studies the role of red heart fungus, which infects the heartwood of older pines, making...

For a male sand goby, playing 'Mr. Mom' is key to female's heart

...unities to reproduce," Balshine said. Sand gobies nest under mussel and other shells, and the males not o... larger ones, a variable used to determine whether nest size also played a role in the males' courting behavior. The researchers then compared the parenting...

Citizens asked to monitor impact of invasive bird species

... of all competitor species (species that take over nest boxes intended for native birds). And although mos...re provided most effectively by people who monitor nest boxes." TBN participants monitor activity inside nest boxes and keep track of data such as egg-layi...

Loggerhead sea turtles nesting earlier due to warmer ocean temperatures

...ver counties where thousands of loggerhead turtles nest every year. About 25 percent of loggerhead nests in the United States are on that stretch of beach between Sebastian Inlet and the southern boundary of Patrick Air Force Base. From 1989 to 2003, the average near-shore ocean temperature in May in that...

For some gorillas, local kin may mean local peace

...acks in the area and that in almost all cases, the nest sites of related silverbacks were found near each other. It was already known that both male and female western gorillas leave their natal group once mature, but the new findings suggest that the dispersing males may remain in the vicinity of male ki...

Wasps' brains enlarge as they perform more demanding jobs

... colony by performing tasks in the interior of the nest before later moving on to jobs on the nest exterior. Finally, they leave the nest to forage for food and building materials. O'Donnell and his...

Duke study gives first worldwide measure of sea turtle casualties by longline fishing

...esearchers. In fact, more turtles "are killed than nest in the Pacific," Crowder told a February symposium on marine animal conservation at the American Association for the Advancement of Science 2004 annual meeting in Seattle. The published study located four "primary hotspots" for longline fishing: in t...

Turtles indeed in danger

...fic turtles die from longline takes each year than nest there. Given 80-95% declines for Pacific loggerhead and leatherback populations, this bycatch is not sustainable....

Woodpeckers: There's a fungus among us

...adequate decay, woodpeckers are unable to excavate nest cavities vital components of forests that serve as nesting sites to a variety of wildlife. "Our study shows that woodpeckers are really the architects and landlords of the forest," said WCS scientist Kerry Farris, the study's lead author. "Their ac...

Keeping populations of cerulean warbler healthy

... very difficult to study in the field because they nest and forage in the high canopy," says Hamel. "Fortunately, we have learned a few tricks, such as surveying from canoes and using carved wooden decoys to attract the males. We have also developed genetic tools to help us track the movement of specific ...

'Snowbirds' versus real birds

...l forests, arrive earlier on the breeding grounds, nest earlier, and are more successful in producing young. "Our work shows that destroying these high quality habitats has a disproportionate effect on the redstart populations: they lose the areas most capable of supporting them," says Dr. Ratcliffe. "As ...

Isotopes from feathers reveal bird migration

...hers first gather feathers from nestlings at their nest sites. Then they gather feathers from birds on mig...ern Alberta, whereas a band can get it to an exact nest location." Satellite telemetry is by far the most accurate method of tracking birds. However, it ...

Unfaithful songbirds increase offspring fitness

...ea were more heterozygous than their non-surviving nest mates. This is a crucial advantage, considering that from an average brood of eleven, only one or two blue tit youngsters ever make it to the next spring. Individual genetic diversity also had effects later in life: more heterozygous adult females pr...

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