Sentences with phrase «on bird numbers»

Other false statements; if all the cats were gone it would have no impact on bird numbers.

Not exact matches

Reasons for the higher number and species diversity of birds and bird territories on organic farms include better breeding habitats and better food conditions.

A study by Rhône - Poulenc (1997) has shown a steady annual increase in the number of bird territories on land converted to organic production and a higher overall number of territories on the organically managed land.

For the table we have translated this to an approximate number of birds per sqm, based on an average slaughter weight of 5 kg for adult females and 17 kg for adult males.

On about the fourth attempt to move in close, I crossed a small clearing and was about to swing around a bush when over it I saw a number of birds wing into the air with loud chirping.

Each bird has an individual number on its band, plus initial letters standing for the breeder or his club.

Blessed with idyllic conditions on Friday evening, many birding teams were fortunate in finding a number of interesting species before sunset.

Exhibit Shines Light On Plight Of Migratory Birds - CBS Chicago - March 3, 2016 An exhibit aimed at bringing public awareness to the number of migrating birds that fall prey to skyscrapers and other buildings has opened at the Peggy Notebaert Nature MuBirds - CBS Chicago - March 3, 2016 An exhibit aimed at bringing public awareness to the number of migrating birds that fall prey to skyscrapers and other buildings has opened at the Peggy Notebaert Nature Mubirds that fall prey to skyscrapers and other buildings has opened at the Peggy Notebaert Nature Museum.

The Academy has a large number of Bailey's photographs in their Archives taken on his trips all over the United States and Canada with the intention of recording a variety of species of birds in their natural habitat.

President Obama's re-election campaign did not use Electionear during the 2008 cycle because it had already launched its paper - based canvassing system that was being tracked by a special numbered coding system by the time it was approached by Garvin and his team, Obama»08 alumni and 2012 national field director Jeremy Bird said during an impromptu chat on Sunday in Cupertino.

«With a recent government funded study showing low compliance with existing regulations in England on lead shot use, it's not surprising unacceptable numbers of wildfowl are still dying avoidable deaths from lead poisoning,» the Royal Society for the Protection of Birds» director of conservation Martin Harper said.

Dr Conor O'Gorman, BASC's policy development manager, said: «The UK section of the report is short on facts, estimating the number of birds illegally killed in the UK as anywhere from 300 to 14,500.

Monies have been approved and so we will consequently work on the percentage because the numbers have to be audited it has to go through a number of things to ensure that a farm was affected with a number of birds..

The study results were published online in a paper titled «Birds have primate - like numbers of neurons in the forebrain» in the Proceedings of the National Academy of Sciences early edition on the week of June 13.

Just 4 kilometres away on the larger island of Skyros, there are plenty of predatory snakes, mammals and birds to keep lizard numbers down.

«We were staggered by the number of birds moving through this trade,» says Martin Gilbert, a veterinarian at the Wildlife Conservation Society who recently co-authored a study in Biological Conservation on merit releases.

Based on a peatland model developed at the University of York and latest climate change predictions, the researchers warn that by 2051 - 80 the dunlin could see a 50 % decline in numbers, with the golden plover down 30 % and the red grouse down by 15 %, all driven by declining abundance of the birds» crane fly prey.

The researchers also found that lizards» resting site choices that heightened individual camouflage were more evident on islands with higher numbers of predatory bird species, suggesting that this behavioral defence is more likely to evolve in riskier environments.

«There are several species of cooperatively breeding birds where helper numbers or helper effort seems to have negligible effect on offspring survival, and that just didn't make any sense.»

Those plants pass on enough energy to sustain a limited number of insects, which in turn supply food for the occasional reptile or bird, all of which ultimately feed the bacteria.

When an alien species enters a new ecosystem, it can alter the environment in a number of ways: by eating native species (in its 50 years on Guam, the Australian brown tree snake has eliminated 9 of 13 native bird species); by spreading disease among them (introduced birds in Hawaii thrive in part because they are far less susceptible to the avian malaria parasite, also an introduced species, than native birds are); or by altering the environment in such a way that favors themselves (like melaleuca, an Australian tree that is spreading through the Everglades in part by changing the frequency and intensity of fires).

They chose this region because it has a large number of cells and because the bird's feet hadn't been treated with arsenic, leaving the DNA there in better shape than on the rest of the preserved carcass.

Coupled with the tooth data indicating an abrupt Cretaceous extinction, the researchers suggest that a number of the lineages giving rise to today's birds were those able to survive on seeds after the meteor impact.

«A management that ensures the maximum number of birds recommended, depending on meteorological conditions, without negatively affecting water quality.»

Survival rates were high in both locations, and more young hawks began breeding on the resort property, probably because more territories were available due to the birds» low numbers.

The IUCN's number is based primarily on assessments of birds and mammals and essentially excludes invertebrates, even though invertebrates constitute roughly 99 percent of known biodiversity.

He notes a number of collaborative bird studies by Israeli, Palestinian, and Jordanian scientists and a recent project to use barn owls to catch rodents on Israeli and Palestinian farm.

Underlying this striking evolutionary transformation change is a halving in the number of wrist bones, but developmental biologists and palaeontologists have different names for most of them, and seldom agree on the correspondence between specific dinosaur bones and those of their bird descendants.

So researchers turned to two different estimation methods — one whereby total mortalities were estimated from the actual number of dead birds recovered, and another in which information on the geographic extent of the oil slick and seabird densities were used to estimate potential mortalities.

«The pressure on these birds by market gunners and others in the US and Canada was so relentless that the vast flocks that were en route to the Pampas of Argentina, where they were again shot in great numbers, simply melted like snow before the midday sun.

Energy company BP faces civil penalties based in part on the number of birds and other wildlife lost in the spill, therefore the mortality estimates could influence the amount the company will be required to pay.

The bacterial population studied in Jiang's lab included as many as 100 million organisms, far more than the number of birds on the Galapagos Islands.

In 2012 turbines killed more bats than birds, and the numbers of the dead were substantial: about 888,000 bats were found on wind farms, compared with 573,000 birds.

Researchers estimated bird and deer numbers at two regions of Virginia — one on the coast and one inland.

But the knock - on effect is on nesting birds, which are also trying to hatch their chicks at the same time that there's the maximum number of caterpillars.»

Oppel and his colleagues set up sound recorders on a remote island in the North Atlantic for two years to «count» the number of nesting birds by recording their calls at night.

And the total number of birds we're talking about is on a grand scale that may not have been seen before,» she said.

They estimate that a carefully prepared 5 % increase in conservation area would allow a dramatically improved capture of bird and mammal biodiversity facets; an approach focused on species numbers alone would be much less optimal, the researchers said.

«Although birds in this study were shown to compensate by switching to other seed types, the findings suggest that the capacity of grazed lands to support similar numbers of birds as ungrazed lands may be compromised,» according to the Vermont Center for Ecostudies» Rosalind Renfrew, an expert on grassland bird conservation who was not involved in the study.

This has been shown to have a small but significant impact on population size by increasing the number of breeding birds, as well as influencing the sex ratio.

The academics studied afternoon bird numbers — which tend to be lower than birds generally seen in the morning — because are more in keeping with the number of birds that people are likely to see in their neighbourhood on a daily basis.

So there is evidence that the birds can bounce back, and the team's modelling indicates that they will very probably try to adapt to their changing circumstances by colonisation Bouvet Island, and by increasing their numbers on Heard and South Georgia islands, which should benefit from improved foraging conditions as the APF edges ever poleward.

They provide control on populations of small mammals and birds, such as beaver, geese and wild turkeys, and can help to provide stability in the composition and numbers of general wildlife populations (Voigt and Berg 1999, Gompper 2002).

A bird banding study has been established there to monitor the birds as they come and go, gathering information on their age, sex, and health, then releasing them with a numbered band that can be looked up in a database if the birds are recaptured later.

Scansoriopterygids are thought to be close relatives of the dinosaurs that would go on to be living birds, though the details of that relation remain unclear because of the small number of known specimens.

A Dutch study finds that spraying bug killers on crops can reduce the number of insect - eating birds

In assessing extinction intensities, scientists often talk about the number of species going extinct within a certain genus, family, class, and so on, as I did above for species of amphibians, reptiles, birds, and mammals.

The results of our study on the conservation of the number of digits provides an important argument in the current controversy on the descent of birds from dinosaurs between developmental biologists and paleontologists.

Part of the balance is limiting poultry numbers to what the farm's soils can metabolize — there should be no more than 500 birds per acre per year, or a limit of 10,000 birds per year on a 20 - acre farm.

A party of three or five or any other odd number can seem to be a awkward number on Valentine's Day and although Valentine's is mostly thought of as a day for love birds, it can also be a time for family and friends to express their love and affection for one another in special ways.