Good hazel dormouse news from the Netherlands


This is a hazel dormouse video.

Translated from the Dutch Mammal Society:

Friday, August 28th, 2015

In the extreme south of the country lives the hazel dormouse. This rare creature lives there hidden in forest edges with lots of blackberries and hazelnuts. In recent years, many protection measures have been taken to expand the habitat of the dormouse. In the Vijlenerbosch forest the Forestry Commission and the IKL have restored several hundred meters of forest edge to create space and light again for the hazel dormouse and on the premises of the Stichting Ark blackberries are encouraged. The dormice have been monitored for more than 20 years, making it clear that the dormouse has benefited greatly from all these actions, with a record number of nests in 2014 as a result. …

On all 48 routes where there was counting no less than 535 (!) nests were observed. A great result compared to previous years, where sometimes only 200 nests were counted.

House mouse under bird feeder, video


Fat has fallen to the ground under a bird feeder in a garden in the Netherlands.

This video shows a house mouse attracted by that.

Michael de Vries made this video.

Sparrows against mouse, rat video


This video shows house sparrows, trying to drive a mouse away from a garden.

Later, a rat turns up, attacking a sparrow.

Liselotte from Germany made this video.

Boa constrictors don’t suffocate rats, new research


This video from the USA says about itself:

Myth Busted: How Boa Constrictors Kill

22 July 2015

New research disproves the long-held belief that boa constrictors kill by suffocating their prey. Researchers at Dickinson College found that the powerful snakes actually inflict a very different cause of death.

From the Journal of Experimental Biology:

Snake constriction rapidly induces circulatory arrest in rats

Received February 21, 2015.
Accepted May 8, 2015.

ABSTRACT

As legless predators, snakes are unique in their ability to immobilize and kill their prey through the process of constriction, and yet how this pressure incapacitates and ultimately kills the prey remains unknown. In this study, we examined the cardiovascular function of anesthetized rats before, during and after being constricted by boas (Boa constrictor) to examine the effect of constriction on the prey’s circulatory function. The results demonstrate that within 6 s of being constricted, peripheral arterial blood pressure (PBP) at the femoral artery dropped to 1/2 of baseline values while central venous pressure (CVP) increased 6-fold from baseline during the same time.

Electrocardiographic recordings from the anesthetized rat’s heart revealed profound bradycardia as heart rate (fH) dropped to nearly half of baseline within 60 s of being constricted, and QRS duration nearly doubled over the same time period. By the end of constriction (mean 6.5±1 min), rat PBP dropped 2.9-fold, fH dropped 3.9-fold, systemic perfusion pressure (SPP=PBP−CVP) dropped 5.7-fold, and 91% of rats (10 of 11) had evidence of cardiac electrical dysfunction. Blood drawn immediately after constriction revealed that, relative to baseline, rats were hyperkalemic (serum potassium levels nearly doubled) and acidotic (blood pH dropped from 7.4 to 7.0). These results are the first to document the physiological response of prey to constriction and support the hypothesis that snake constriction induces rapid prey death due to circulatory arrest.

Mice kill petrel chicks on Gough island


This video says about itself:

By Ben Dilley, Gough Island, December 2013

Check out this short clip showing the new prion species making a racket in a cave on Gough Island. The new prion was discovered by research team Karen Bourgeois and Sylvain Dromzée who spent 2011-2012 on Gough Island as field assistants for the Royal Society for the Protection of Birds and the Percy FitzPatrick Institute.

Broad-billed prions are the most abundant seabirds breeding on Gough, and they have a broad, blackish bill. By comparison, the new species has a narrower, blue-edged bill and breeds at a different time of year. The recent discovery that two species breed on the island three months apart came as a complete surprise! The paper reporting the new prion was published by Peter Ryan et al. in Polar Biology in March 2014.

From Antarctic Science:

30 June 2015

Effects of mouse predation on burrowing petrel chicks at Gough Island

Abstract

Since 2004 there has been mounting evidence of the severe impact of introduced house mice (Mus musculus L.) killing chicks of burrow-nesting petrels at Gough Island. We monitored seven species of burrow-nesting petrels in 2014 using a combination of infra-red video cameras augmented by burrowscope nest inspections.

All seven camera-monitored Atlantic petrel (Pterodroma incerta Schlegel) chicks were killed by mice within hours of hatching (average 7.2±4.0 hours) with an 87% chick failure rate (n=83 hatchlings). Several grey petrel (Procellaria cinerea Gmelin) chicks were found with mouse wounds and 60% of chicks failed (n=35 hatchlings).

Video surveillance revealed one (of seven nests filmed) fatal attack on a great shearwater (Puffinus gravis O’Reilly) chick and two (of nine) on soft-plumaged petrel (Pterodroma mollis Gould) chicks. Mice killed the chicks of the recently discovered summer-breeding MacGillivray’s prion (Pachyptila macgillivrayi Mathews), with a chick mortality rate of 82% in 2013/14 and 100% in 2014/15. The closely-related broad-billed prion (P. vittata Forster) breeds in late winter and also had a chick mortality rate of 100% in 2014. The results provide further evidence of the dire situation for seabirds nesting on Gough Island and the urgent need for mouse eradication.

Webcam young white storks eat worms, moles, mice


This video from the Netherlands is called White Storks 5th May 2013 11:08 Feeding – 4 chicks.

In the Netherlands, this spring and summer, there is a webcam at a white stork nest.

It turns out the parents feed the young storks mainly earthworms.

The parents bring other prey, like moles and mice, as well.