Sentences with phrase «total number of bird»

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.

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.

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

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).

Students use the manipulative to find the total number of birds.

That's crazy since the total number of birds that reside in the U.S. is around 3.2 billion (Partners in Flight 2013).

Not exact matches

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.

Biologists also have used the studies from Marra, Temple, and a number of others to estimate the total U.S. death toll for birds due to cat predation as more than a billion per year.

``... the ecological and conservation significance of these kill tallies is difficult to contextualise, because (1) there are no reliable estimates of the total population of birds in Australia; (2) predation may fall disproportionately on some bird species; (3) some bird species may be able to sustain high mortality rates and maintain viable populations but others may not; and (4) as demonstrated here, there is substantial spatial variation in the numbers and proportion of birds killed across Australia.»