nest

I can see an eagle's nest on the rocks.

I saw the crow's nest and his sailor boat bed.

So if there are people or dogs on the beach, the eggs and fledglings in the nests are really vulnerable.

In fact, when tapes of begging tree swallows were played at an artificial swallow nest containing an egg, the egg in that “noisy” nest was taken or destroyed by predators before the egg in a nearby quiet nest in 29 of 37 trials.

These loud cheeps and peeps might give the location of the nest away to a listening hawk or raccoon, resulting in the death of the defenseless nestlings.

A classic example is noisy begging by nestling songbirds when a parent returns to thenest with food.

And in a broken wing display, the bird spreads and drags its wing or its tail, and while it does that, it slowly moves away from the nest.

Well, they do that to draw the predator away from their nest, away from their eggs or their young birds.

Indeed, if you take baby tree swallows out of a nest for an hour feeding half the set and starving the other half, when the birds are replaced in the nest, the starved youngsters beg more loudly than the fed birds, and the parent birds feed the active beggars more than those who beg less vigorously.

When experimentally deprived baby robins are placed in a nest with normally fed siblings, the hungry nestlings beg more loudly than usual—but so do their better-fed siblings, though not as loudly as the hungrier birds.

One possibility is that a noisy baby bird provides accurate signals of its real hunger and good health, making it worthwhile for the listening parent to give it food in a nest where several other offspring are usually available to be fed.

These higher-frequency sounds do not travel as far, and so may better conceal the individuals producing them, who are especially vulnerable to predators in their ground nests.

Well, she takes about fifteen out of the nest at a time, carrying them in her mouth to the nearby water.

So she takes them out of the nest.

And interestingly, they also show a consistent pattern of nest care by the male.

They also examined the fossilized bones of those three types of dinosaurs that were found on or near nests to determine their sex.

You see, bird species in which only the males take care of the nest tend to have the largest clutches of eggs.

But by the 1990s, other experts had convincingly made the case that instead of robbing the nest; the Oviraptor was probably taking care of the eggs.

In the 1920s, a paleontologist discovered the fossil remains of a small dinosaur near a nest containing eggs.

Since adult dinosaur fossils have sometimes been discovered near or on top of nests, we’ve been looking at the dinosaur parenting behavior.

While this contest over an unoccupied nest site produced no obvious mortality, fights over occupied nests sometimes kill over 1,000 bees in a single battle.

Each dawn, fifteen to thirty workers from two competing colonies arrived at the contested nest site.

The researchers observed battles over a nest tree that lasted for two weeks.

If workers from two different colonies arrive at the prospective nest at the same time, they may fight for possession.

Aggressive species apparently mark prospective nest sites with pheromones, chemical substances secreted by some animals for communication with other members of their species.

Their observations provide insights into the mechanisms that establish and maintain the regular nest distribution of these species.

The fifth species was not aggressive, and its nests were randomly distributed over the study area.

All four species with regular nest distributions were highly aggressive to bees from other colonies of their own species.

Hubbell and Johnson mapped the nests of five of the nine species of stingless bees accurately, and the nests of four of these species were distributed regularly.

The number of colonies in the study area was not limited by availability of suitable trees, and a clumped or regular distribution of colonies was not due to an underlying clumped or regular distribution of potential nest sites.

They also found that the number of potential nest sites was much greater than the number of bee colonies.

They found that potential nest trees were distributed randomly through the study area.

Though Hubbell and Johnson were interested in how bee behavior might affect colony distributions, they recognized that the availability of potential nest sites for colonies could also affect distributions.

So for example, when ants leave the nest, they deposit a pheromone trail along the route they take.

I mean, for one thing, they must burn up a lot of energy flying back and forth and also the parents are gonna have to be away from the nest that much.

Student:But why don't they just build their nest closer to their food supply?

And by the time it got back to the nest, it has flown nine thousand miles. Yes, Bob?

And I read in another study where one albatross left a chick in its nest and went out in search of food.

And you have one species that forages an average of a thousand miles from its nest.

It supplies the nest’s inhabitants with fresh oxygen as it rises through the fungus-growing area back up to the attic.

The answer lies in the construction of the nest.

But how is this well-insulated nest ventilated?

The termites saturate the atmosphere of the nest, bringing it to about 100 percent relative humidity, by carrying water up from the soil.

The metabolism of so many termites and of the fungus that they grow in their gardens as food helps keep the interior of the nest warm and supplies some moisture to the air in the nest.

According to Luscher, a medium-sized nest of Macrotermes has a population of about 2 million individuals.

The surrounding soil keeps the nest moist and tends to keep the temperature at a more or less favorable level.

But after a longer trip, they took a totally different route: one that led them nine degrees east of the nest.

In each trial, the mole rats started out in their nest, went to the food source and then had to find their way back home, back to the nest.

Now, with their bicycle wheel tunnel system the researchers were able to vary the distance that the mole rats travel between their nest and their food source by creating long routes and short routes.

For example, let's say a mole rat wants to find its way through its tunnel system back to its nest where it sleeps.

The actions of these potential nest predators could have reduced moa populations without leaving much direct evidence.

My wife seems to be building a nest of her own at Osborne House.

The baby had been asleep in her nest of pink and white blankets.

But to understand more about how to protect and support the humming birds the best we can, we've got to learn more about their breeding, nesting sites and migration routes, and also about the natural habitats we find there.

The warm air in the fungus gardens rises through the nest up to the attic.

Some species may nest in close proximity to each other.

Their nesting sites are affected too, the same by the same sorts of human activities.

Further evidence for the costs of begging comes from a study of differences in the begging calls of warbler species that nest on the ground versus those that nest in the relative safety of trees.

David Haskell created artificial nests with clay eggs and placed them on the ground beside a tape recorder that played the begging calls of either tree-nesting or of ground-nesting warblers.

So as one of the first steps in their study, they mapped the distributions of trees suitable for nesting.

They generally nest in trees and live in colonies made up of hundreds to thousands of workers.

And second, they can't always nest on an island that's closest to the best feeding ground because some of those islands have too many predators on them.

Albatross are seabirds that nest on islands and forage for food out in the open sea.

Subterranean termites, the destructive species that occurs commonly throughout the eastern United States, attain these conditions by nesting in moist soil that is in contact with wood, their only food.

Professor: You survive on what's left over: water, food, nesting or breeding sites, whatever. 

By the 1960s the raccoon had become a major predator of the canvasback ducks nesting in southwestern Manitoba.

Biarritz was notorious in those days as a nest of spies.

Are you telling me that you've got your own little nest of informers in the Police Department?

Russian dolls have smaller versions nested inside each other.