Sentences with phrase «number of bird species»

Recent sightings of a black stork, a European nightjar, and a Pacific golden plover brought the total number of bird species spotted on Kuyucuk Lake in Kars to 223 — 48 percent of all those present in Turkey.

The tropical Andes contains 10 % of the world's vascular plants and a high number of bird species, such as Peru's national bird the Cock of the Rock.

Extending that ratio out to the entire bird population, the researchers suggest that there may be roughly double the number of bird species in the sky.

Typical numbers for the total number of bird species worldwide tend to center around a range of 9,000 to 10,000, but the museum's scientists say that number is likely closer to 18,000.

Mastication reduced the number of bird species by about 50 percent and reduced total numbers of birds by about 60 percent.

Researchers in Queensland, Australia, assessed the condition of fragmented eucalyptus forests at 10 sites using conventional measures — including the size of forest patches, vegetation characteristics and the number of bird species detected — and sound recordings.

The breeding populations of a number of bird species in Western European farmland have declined in the past decades.

Research from the Smithsonian Migratory Bird Centre has demonstrated that the number of bird species found in shade coffee plantations is almost twice that found in sun grown coffee (Smithsonian 1994).

During their surveys, researchers found similar numbers of bird species in secondary stands compared to stands comprised entirely or in part of old - growth forest.

Not exact matches

Two new studies from Europe have found that the number of farm birds in France has crashed by a third in just 15 years, with some species being almost eradicated.

According to natural selection the members of the bird species with the smallest useless wing would be the most adaptable and most likely to survive in the largest numbers.

In other words, the individuals of each species of migratory bird are slowly diminishing in number.

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

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

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.

The volunteer survey invites participants to list the bird species and greatest number of each seen at one time at their feeders and in their yards during that Saturday and Sunday.

A limited number of mute swans would be allowed to stay in upstate under the DEC's latest management plan for the species, released last week after years of controversy over the huge white birds.

That is one of the surprising results of the first study to systematically measure the number of neurons in the brains of more than two dozen species of birds ranging in size from the tiny zebra finch to the six - foot - tall emu, which found that they consistently have more neurons packed into their small brains than are stuffed into mammalian or even primate brains of the same mass.

The team compared the body structure of a number of early birds and found that some toothed species were more adapted for flight.

Volunteers for the aptly named AMBLE regularly walked beaches in Door County in Wisconsin, Sleeping Bear Dunes National Lakeshore in Michigan, and the Upper Peninsula of Michigan, recording the number of sick and dead birds of different species.

After two years, as expected, data showed that the number of birds and other species in each patch was diminishing.

An even bigger problem, he says, is that competitive displays by male birds seeking to mate with females are «only observed in a small number of species around the world.»

They tabulated the number of juvenile birds versus adults for 34 species breeding near the stations.

Some of these regions, such as the southern Andes and certain isolated mountain ranges in the north, are also home to high numbers of endemic and threatened bird species, she finds.

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.»

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).

«We show that even if deforestation had completely halted in 2010, time lags ensured there would still be a carbon emissions debt equivalent to five to ten years of global deforestation and an extinction debt of more than 140 bird, mammal, and amphibian forest - specific species, which, if paid, would increase the number of 20th century extinctions in these groups by 120 percent,» says Isabel Rosa (@isamdr86) of the Imperial College of London.

Yet, according to a new study involving 147 cities worldwide, surprisingly high numbers of plant and animal species persist and even flourish in urban environments — to the tune of hundreds of bird species and thousands of plant species in a single city.

Results showed a large decrease in the number of birds in the «sonic net» and areas just outside and found that it was particularly effective at deterring a number of species that were at high risk of bird strike such as starlings.

The academics attached tiny tags with a unique electronic number onto the legs of 452 blue tits and great tits, two species which typically visit garden bird feeders.

The number of mammal and bird species varies from place to place, but these groups of vertebrates still span much of the world.

Mixed forests, however, harbored more bird species and similar overall numbers of birds compared with cropland.

With access to museum ornithological collections from areas of South America that Darwin had not visited, Gould corrected a number of taxonomic errors Darwin had made (such as labeling two finch species a «Wren» and an «Icterus») and pointed out to him that although the land birds in the Galpagos were endemic to the islands, they were notably South American in character.

Astroviruses from a number of species, including human, bovine, bird, cow and dog, were detected in monkeys, This «challenges the paradigm that AstV (astrovirus) infection is species - specific,» the authors wrote.

All bird species showed the same response, the team reports in the 23 December issue of Science: the number of fledglings per breeding pair started to decline when the abundance of forage fish dropped below one - third of the maximum observed amount.

The researchers looked at correlations between egg shape and traits associated with the species of bird, including nest type and location, clutch size (the number of eggs laid at a time), diet and flight ability.

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 specimens of fishes, marine reptiles, non-avian dinosaurs, birds, and mammals of this age have all been recovered from this now - frozen continent, most fossils, especially those of land - living species, are fragmentary and poorly informative, and a number of major vertebrate groups that likely once lived in Antarctica (e.g., amphibians, crocodilians) have yet to be discovered at all.

In the 20 to 10 million years before the mass extinction that toppled all dinosaurs except for birds, the researchers found, therian mammals did not have a large number of species — but there were greater differences between each species.

However, other bird species are running out of disease - free habitat and the population numbers that would allow the evolution of resistance.

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.

Logged total numbers of birds, amphibians and corals are represented by A, B and C respectively (see Fig. 3 for maps of the total numbers of species).

Apparently, reisolation affects the number of birds using fragments more than it affects species richness.

This number includes a minimum of 95 bird species, as well as native and introduced species such as the southern brown bandicoot and echidna, and house mouse, European rat, rabbits, foxes and feral cats.

November 13, 2014 • The bird is now protected under the Endangered Species Act, which could stop some oil and gas development in Colorado and Utah — and will likely start a number of legal challenges.

While the majority of dinosaur eggs were buried in hopes of protecting their offspring, there were a number of species that built nests and took care of their offspring similar to how modern birds do today.

Placing a number of feeders in one area will create a great bird «oasis,» where many species will come in looking for a snack.

Many bird enthusiasts these days are not only referring to wild birds as «outdoor pets,» but are also recommending that people buy high - quality birdseed to draw a wider variety of species and in greater numbers.

What species of birds to offer depends on a number of factors, such as location, availability and the type of customers who come into the store.