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New Zealand's North Island sea bird population is in serious decline

An estimated 90 percent of seabirds in the North island are at risk of extinction according to the Northern New Zealand Seabird Trust report. More than 28 species, including five that are found nowhere else in the world, live in northern New Zealand with very little known about the status of them and the specific threats to them, the report said.

Bird populations under stress

At least 314 species of American birds are expected to lose 50 per cent or more of their range by the end of the century, and have been listed by the Audubon Society as endangered. A United Nations science report says 1 million species of plants and animals are at risk of going extinct. Most at risk are sea birds and grasslands birds, experts say. Birds known as aerial insectivores, like swifts (Apus apus) and nighthawks (Chordeiles minor) , are at risk because the insects they depend on are getting harder to find.

We did not get our act together in time, and are travelling down another DDT precipice

A Dutch researcher, H Tennekes has made the case that neonicotinoids, a special group of insecticides, are causing a catastrophe in the insect world, which is having a knock-on effect for many of our birds. These chemicals were introduced in the 1990’s and it wasn’t long afterwards that beekeepers noticed massive declines in bee numbers (Colony Collapse Disorder). France banned the use of one of these chemicals on sun flower seed in 1999, and Germany and Italy have banned two types on maize.

Devon wildlife threatened by Extinction

At the recent Extinction Rebellion protest in Moretonhamstead as reported in the last edition of The Moorlander, one of the flyers the group were handing out brought attention to the worrying decline in Devon’s wildlife. A 90% decline in Greater Horseshoe bats (Rhinolophus ferrumequinum) has been seen, 97% of wildflower meadows have been lost since the 1930s, Nightingales (Luscinia megarhynchos) no longer breed in Devon; the last pair was recorded in 1993.

Wildlife species in danger of disappearing from East Anglia

Experts from Suffolk Wildlife Trust, Buglife and the RSPB have all pointed to species in danger of disappearing from East Anglia. They include stone curlew - only 202 pairs nested in the East of England last year; the shrill carder bee - common in the region 25 years ago but now found only in the Thames Gateway area; and the crested cow-wheat - a plant limited to a small number of roadside verges because grassland has disappeared to farming or construction. Indeed, habitat destruction and human disturbance are cited as the two most common reasons these species are on the brink.

The Curlew in steep decline in Wales

The latest Breeding Bird Survey (BBS) report, published today, shows that the Welsh breeding Curlew population has fallen by 68% between 1995 and 2017, not good news for a bird that has long been associated with Welsh upland and farmland. As a result of the precipitous decline in breeding numbers, the Curlew (Numenius arquata) is one of UK’s most pressing conservation issues. Its decline in Wales is mirrored with an overall decline of 48% across the UK. It’s not good news for Welsh Swifts (Apus apus) either; their breeding population is down by 69% over the same period.

Calibration and validation of toxicokinetic-toxicodynamic models for three neonicotinoids

In this study, the survival of macroinvertebrates after exposure to the neonicotinoid insecticide was modelled using TKTD models from the General Unified Threshold models of Survival (GUTS) framework. The models were calibrated on existing survival data from acute or chronic tests under static exposure regime.

Insecticide applications can depress yellowhammer breeding productivity

The UK population of yellowhammers (Emberiza citrinella) has declined since the mid‐1980s. Concurrent increases in the use of pesticides are believed to have reduced the availability of food resources for farmland birds, including yellowhammers. We studied nesting yellowhammers on a lowland arable farm in North Yorkshire between 2001 and 2003, to examine the effects of food abundance on breeding success and the effects of insecticide on food abundance.