Tag: "nests" at biology news
Study to determine if infidelity among birds an attempt to avoid inbreeding, diversify genes
... than 8 percent of the broods in western sandpiper nests
were not the offspring of both parents in the nest; 5 percent of Kentish plover nests
and 20 percent among common sandpipers. Sandercock said the study provides some of the "first baseli...
Effects of global warming already being felt on plants and animals worldwide
...ogists, who kept track of some 21,000 tree swallow nests
in the United States and Canada over the last 40 years, concluded that the average egg-laying date for female swallows has advanced by nine days - a phenomenon that mirrors other North American studies confirming higher temperatures and the earlier a...
Evidence for orangutan culture
...d to amplify the sound; -- building sun covers for nests
or, during rain, bunk nests
above the nests
used for resting. According to first author Carel van Schaik of Duke University, th...
Hikers may disturb breeding spotted owls
... affects the owls, Swarthout and Steidl studied 10 nests
during the breeding season in Utah's Canyonlands a...espectively, during the two-year study period. The nests
were 36-223 feet above the canyon bottoms, and the researchers observed the owls during a series of ...
Michigan researcher helps resolve the conflict between exotic birds and eco-tourists
...iddle of the colony and drove boats directly under nests
overhanging the river. There were even reports of ...dition, she points out, when the parents leave the nests
there are many predators waiting to attack the eggs and the chicks. Next, she and her team interview...
Leatherback sea turtles careening towards extinction
...increasing 11-13% per year, from a low of only 800 nests
in 1986 to 6,200 in 2002. "People worked very hard for over a decade protecting them on nesting beaches and in the water, and now we're seeing recovery. So there is a precedent for success. Saving leatherbacks will be harder because of their range...
Red Imported Fire Ant Conference to discuss control and eradication of fire ants
...ern to people and their pets. RIFAs tend to build nests
in open, sunlit, grassy areas. Fire ants aggressively defend their mound. When the mound is disturbed by an intruder, hundreds of RIFA worker ants pour out of the mound and simultaneously begin an attack. A RIFA is dark reddish-brown in color, an...
Coots can count
...ifornia, Santa Cruz. Lyon studied hundreds of coot nests
in British Columbia during a four-year investigati...ke cuckoos, which lay their eggs in other species' nests
and thereby avoid the trouble of raising their own chicks. But brood parasitism also occurs within s...
Wild ape population undergoing 'catastrophic' decline
... techniques to compare the spatial distribution of nests
found in the new surveys to the spatial distribution of nests
reported in the earlier studies. As an example of the decline, Walsh cited a small study from 1991 i...
'Work stinks': It's more than just a slogan among ants, researchers find
...f workers quietly going about their jobs. Some dig nests
while others gather food or tend the young. Remark...o accomplish that, researchers would arrive at the nests
early each morning and round up all of the patrollers before they had a chance to return home from t...
Lead-based paint is poisoning albatross chicks at Midway Atoll National Wildlife Refuge
... Santa Cruz, shows that Laysan albatross chicks in nests
near the buildings are suffering lead poisoning as...on the ground and have no fear of humans, so their nests
are found not only in open fields but also scattered among the buildings and beside roads and walkwa...
More raccoons may mean fewer songbirds
...y shows that populations of birds with accessible nests
have been dropping since raccoon populations began...6 to 2001. There were 18 low-nesting species (with nests
less than 8 feet above the ground) and 22 high-nesting species (with nests
more than 8 feet above th...
Scientists celebrate a sea turtles homecoming
... project began, virtually all hawksbill sea turtle nests
were poached for their eggs. Recent surveys have shown that the number has dropped to an amazing ten percent or less, due almost entirely to education efforts. But Lagueux warns that loss of sea turtle nesting habitat now looms as one of the largest...
Nurseries in the deep sea
...Escarpment, off Northern California. "The sculpin nests
look like large splotches of purple strewn across ...labby tadpoles. Drazen estimates that some sculpin nests
may contain up to 100,000 eggs. The nursery area lies near the crest of an undersea rise, almost a m...
Snowy plover 'nursery' success earns Resource Stewardship Award
... chose to breed in the protected area. They made 9 nests
with 21 eggs, of which 16 hatched, and 14 chicks f...d scaring away crows trying to steal eggs from the nests
to eat. On a beach where only a few years ago almost no beach-goers could identify a snowy plover, ...
Scientists estimate risk of raven predation on desert tortoises
...nile tortoise shells have been found beneath raven nests
throughout the desert. Furthermore, large declines in the tortoise population, including younger tortoises, have raised concerns about the tortoise population's ability to replenish its dwindling numbers. Ravens are both hunters and scavengers; the...
Census finds mountain gorillas increasing
... in DRC. Participants recorded data on all gorilla nests
and other signs, which were then used to establish the current estimate of 380 gorillas. Although far fewer in number than their western relatives, mountain gorillas have had a profound effect on both the public and the naturalists who have encounter...
Endangered sea turtles make a dramatic turnaround
...he practice of illegally removing turtle eggs from nests
has dropped from nearly 100 percent on several islands known as the Pearl Cays, to approximately 21 percent during 2002, according to the researchers, who published their results in the latest issue of the journal Chelonian Conservation and Biology. ...
Keeping populations of cerulean warbler healthy
... cerulean warblers return in April or May to build nests
in the upper canopy of forests in the southeastern United States. Since 1966, populations of the species have declined an estimated 70 percent, the decline tied to the fragmentation and destruction of habitat in both breeding and winter ranges. For i...
USGS February science picks
...ral cats kill chicks in about 10 percent of palila nests
found on Mauna Kea Volcano each year. Surveillance video and other techniques have shown feral cats to be the most damaging bird predator on Mauna Kea, but non-native rats and mongooses also prey on palila and their eggs. These predation pressures sl...
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