Zwaluwen

Zwaluw legt het loodje

De jonge zwaluwen in Groningen en het Lauwersmeergebied sterven bij bosjes. Bovendien zijn tal van zwaluwnesten leeg gebleven dit voorjaar. Ecoloog Jan Doevendans maakt zich grote zorgen. Volgens hem verhongeren de zwaluwen door de massale insectensterfte. ,,75 procent van de insecten is verdwenen, wat de inzet is van de teloorgang van de zwaluw.’’

Canada’s grassland birds have plummeted in number since the 1970s

The North American Bird Conservation Initiative in Canada released the second State of Canada’s Birds report last week. The report, a joint project of Environment Canada and numerous government and conservation organizations, looks at the status of Canada’s bird populations going back to 1970.The study found that shorebirds, grassland birds, and aerial insectivores were in rapid decline across Canada, with numbers down 40, 57, and 59 per cent since 1970.

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.

De Nederlandse ornitholoog die de gevaren van DDT en IMIDACLOPRID vroegtijdig onderkende

Natuurbeschermer Maarten Bijleveld (82) is al ruim vijftig jaar weg uit Nederland. Hij woont in Zwitserland, maar hij stond als student biologie aan de wieg van het Wereld Natuur Fonds in Nederland. „Ik ben de laatst levende medeoprichter.” Wat Bijleveld de afgelopen tien jaar vooral bezighoudt, is de strijd voor wetenschappelijke waarheid wat betreft de neonicotinoïden, neurotoxische bestrijdingsmiddelen die een „desastreuze” uitwerking hebben op de natuur. Bijleveld heeft het vorige week verschenen rapport van de Verenigde Naties over het dramatische verlies aan biodiversiteit gelezen.

De ramp neemt zijn loop en niemand houdt hem tegen

De Nederlandse toxicoloog Henk Tennekes beweert dat de neonicotinoïden verantwoordelijk zijn voor het enorme verlies van biodiversiteit. "Voor onze ogen", zegt Tennekes, "vindt de ecologische ineenstorting plaats", die de milieuramp met het insecticide DDT verre overtreft. De gevolgen, zoals Tennekes ze beschrijft, van de sterfte van insecten die vissen, vogels, amfibieën en reptielen beroven van voedsel.

DAS DESASTER NIMMT SEINEN LAUF – UND NIEMAND HÄLT ES AUF

Der niederländische Toxikologe Henk Tennekes behauptet, dass die Neonikotinoide generell verantwortlich sind für eine Verschärfung des Überlebenskampfes auf Feld und Wiese. „Vor unseren Augen“,sagt Tennekes, „findet der ökologische Kollaps statt“, einer, der womöglich das durch das Insektizid DDT einst verursachte Vogelsterben übertrifft. Folgen, wie Tennekes sie nicht nur für Feld-, sondern auch für Wasservögel beschreibt: Die Insektizide töten oder schwächen Insekten und rauben Vögeln die Nahrung.

Nearly 70 per cent decline in numbers of curlew breeding in North Wales

THE latest Breeding Bird Survey (BBS) report shows that the Welsh breeding curlew population has fallen by 68 per cent between 1995 and 2017. As a result of the precipitous decline in breeding numbers, the curlew (Numenius arquata), long been associated with Welsh upland and farmland, 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 per cent over the same period.

Starlings disappearing from Scotland and UK

Scotland’s starling and rook populations have fallen dramatically over the past two decades, according to a new report. Surveys show numbers of starlings (Sturnus vulgaris) north of the border were down by 28 per cent in 2017 compared to 1995, with a further 12 per cent loss in the past year. This is part of a worrying UK-wide decline of 52 per cent since 1995. Rook (Corvus frugilegus) numbers in Scotland have fallen by 37 per cent over the same period.

The swifts are in freefall since the introduction of neonicotinoids

It is the most miraculous bird, the ultimate winged messenger, exploring our globe, spending its life on the breeze. Sickle-shaped wings silhouetted against the sky, the swift (Apus apus) is the fastest of all birds in level flight and remains entirely airborne for 10 months, or more, feeding, sleeping and mating on the wing. These long-lived creatures can clock up 4 million miles, commuting between English summers and African winters.