Sentences with phrase «number of breeding pairs»

The bald eagles are hatching and this year there is a record number of breeding pairs on the islands.

However, the number of breeding pairs decreased from six in the last count to just three.

«The decrease in the number of breeding pairs, however, is cause for concern.

More importantly, the number of breeding pairs increased from just two in each of the preceding annual counts to six in 2011.

The number of breeding pairs of Herring Gulls peaked at 1,525 in 1988, Great Black - backed Gulls reached 90 pairs around the same time and the highest number of Lesser Black - backed Gulls was recorded at 63 pairs.

In a bottom - line result, the researchers concluded that protection increased the number of breeding pairs at Voyageurs by 37 percent; other factors accounted for the rest of the increase.

Overall the number of breeding pairs (whether successful or not) rose from 10 to 48 pairs between 1991 and 2016.

Not exact matches

When looking at nests rather than the overall population, protection significantly improved breeding activity, with annual increases of 8 percent in nesting success (meaning the breeding pair had at least one young) and 13 percent in the average number of young per occupied nest.

I don't know if anyone has ever done a census of actual numbers of, you know, breeding pairs of birds in the park.

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.

Why Numbers Increase The American Humane Association estimates that a breeding pair of cats adds 12 cats t their population each year.

There are only a couple thousand breeding pair in the pacific northwest, say on the order of 10,000 individuals alive at any one point in time (numbers flucuate greatly both by year and season).