Tag: "nests" at biology news

CU Research Team Unravels Mystery Of Larceny Among Tropical Ant Species

...." E. ruidum ants generally live in small, shallow nests in the ground,each hosting from up to 200 ants and... ants generally took cheese pieces into their home nests withinminutes, said Breed. Since thieving E. ruidum ants from different nests wereusually lurking ...

A first: Endangered puaiohi birds fledge four chicks in the wild

... Tweed says that released birds have built 14 nests to date in the Alakai Wilderness Preserve on the island of Kauai. Some nests remain active or have already produced fledglings-chicks capable of leaving the nest. ...

Threatened marbled murrelet first to be hatched in captivity

... in Canada where the threatenedbird nests. It only nests in old-growth forests. As the trees disappear due tologging, so does the nesting habitat. Fred Cooke, who holds the Canadian Wildlife Service chair in wildlife ecologyand is one of Canada's leading ornithologists, specializes in the study of birdp...

Presence of a fertile female in the next nest can lead a bird astray, UB research finds

...ird speciesoften do have extra-pair young in their nests -- birds that are not fathered bythe companion mat...y to matewith neighboring females who are building nests and laying eggs, the male spendssome time pursuing matings with these females and does not guard his...

Gobbling food helps threadsnakes avoid danger; in a snake-eat-ant world, it's survival of the fastest

..., Kley and Brainerd suggest. When they invadeants' nests to find sufficient food, they have to eat very quickly to avoid being attacked, and even killed, by the large and powerful worker antsguarding the nests. Very little research has previously been done on threadsnakes, partly because their small size ...

Brain neurochemicals, not gender, tell a female to act like a female

...ip songs are successful, females briefly visit the nests to deposit eggs, then leave the type I males to fertilize the eggs and raise the young. Sometimes, however, the type I males' songs have an unintended effect, attracting a different kind of male of the same species. Called type II or "sneaker" males...

New Science study revisits the debate over bird parents, predators, and family planning

...d out forests in two different regions. Some 1,331 nests were monitored in subtropical Argentina, and then compared with 7,284 nests in Arizona. As expected, typical clutches were much smaller in Argentina, where bird mothers produce...

Blister beetles use sex and subterfuge to infiltrate bee's nests

...o multiple females and, subsequently, the multiple nests of each female," says Saul-Gershenz. Female bees ...n unwittingly transport these larvae back to their nests while provisioning them with pollen and nectar for their own eggs. "Once inside, the larvae parasiti...

Cowbirds' winning songs reflect brainpower

...e parasites of the bird world -- commandeering the nests of other birds, hoarding their food and causing starvation -- Cornell University behavioral researchers know these songbirds have a redeeming quality: They carry an important, evolutionary tune. Like the Mick Jaggers of music, male cowbirds attract...

Fragmented Forest, Fragmented Food

...tches of eggs and have short nesting cycles. Their nests are often found in tree forks or bushes about thre...in the smaller fragments, females incubating their nests received 40 percent fewer feeding visits from their mates. In addition, females were two times more...

Grasslands, deserts, mountains and fire

... such as ground squirrels and mice that invade the nests and eat the eggs. Some of the bird species that ma...rassland area may relate directly to the number of nests that are invaded. 2002: International year of the mountain Half of the fresh water that is cons...

University of Georgia geneticist among the first to study genetic mating systems of fishes and turtles

...kidnappers. These males, it turns out, are tending nests in which they have sired none of the young, having "evicted" the rightful males or taken their places when some deadbeat dads may simply have fled the area. "This might be especially common in species or in ecological settings where suitable nesting ...

Cold water off Brazil might be causing Argentine penguin nest failures

... many as usual are breeding. They started with 116 nests in September and laid their eggs at the end of Oct...ing in Argentina reported that of the 116 original nests only 39 had not been abandoned. "Some of the females had been sitting on nests for nearly three week...

Sex lives of wild fish: Genetic techniques provide new insights

... familiar to sport fishermen reproduce by building nests and laying eggs in the spring. But unlike birds an...dy and his colleagues examined the genetics of the nests to determine how successful these alternate approaches were, and found that the parasitic males only...

Nile crocodiles threatened by alien weed

...k of suitable ones." Leslie and Spotila found that nests shaded by trifid weed were 5 to 6 degrees Centigrade cooler, on average, than nests in preferred unshaded habitat, ensuring that the hatchlings were heavily skewed toward females, if t...

Gene therapy restores feeding behavior to starving mice

... show no preference for sweets, they fail to build nests and they lack curiosity in novel environments. The...venated nest-building behavior. Mice readily build nests when given nesting material, said Palmiter. But in the absence of dopamine, the mice never built nes...

Caterpillars make noise to fend off intruders, researchers discover

...uently ended with intruders damaging the residents nests by biting through the silk strands. In follow-up t...d residents, when returned to the leaf where their nests had been taken over, took on the role of invader, with the new occupant defending the nest as its ow...

New theory of the evolution of bird flight linked to parental care

...s were reptiles that established and guarded their nests on the ground, much like crocodiles. Over time, th...late their eggs and to "parachute" from their tree nests to a soft landing. Later they would develop the ability to glide and eventually fly by flapping thei...

Farming inside forests hurts bird communities more than timber harvesting, study suggests

...sts that farming may make bird nests more vulnerable to predation by ... involved identifying individual nests and observing the activity of birds inside them. "The firs...

Icebergs devastating impact on Antarctic marine life revealed by satellite data

...er to feed, he added. In doing so, they left their nests exposed for longer periods of time than they normally would. That made them vulnerable to predators such as the skua a large gull that feeds on chicks and the eggs. So penguin breeding success was much lower last year. Current satellite images show...

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