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Nest tube issues


holloway
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Of late i have started to notice that corvids are now beginning to see duck nest tubes  as recommended by Basc and others as an easy meal ticket .They have at least locally ,apparently learnt that they can negate long fruitless hours of searching  for nest by merely staking out these man made constructions ,or at least maintaining a regular watch on the proceedings within.

 As we all know corvids are not stupid and i think all we have done with nest tubes is advertised potential nest sites and easy pickings ,time will tell if this happens all around the country .   I personally would not advertise the use of such artificial structures as it is now resulting in carnage ! please monitor your own tubes and give feedback ,some areas will probably take a little time but i am sure in time nest tubes will be largely discredited.

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  • 2 weeks later...

If I may, I think that there needs to be a little more science before we say stop putting up nest tubes. I am not going to dig around to quote it, but nest tubes are proven to improve nesting sucess in mallard. 

GWCT and others have long known that a species needs 3 things to grow: food, habitat and predator control. Known as 'the three stalls'.

The nest tubes enhance one specfic part (nesting habitat) of those 3 elements. For the mallard in this case to boom in number the other two parts need to compliment the nesting habitat. In this case, as you have observed crows are the predator species that need controlling. Therefore the take away from this observation should be some corvid control by whatever means are most appropriate to the situation is the nest step to boost the mallard population. By settling all three stalls in order, we can set the conditions for significant population growth. If I lived near you, I would volunteer to get after those corvids myself! 

It would be interesting to hear if any other crows have learnt this behaviour (hopefully not), or if you just have a few local ones that have.  

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On 21/08/2024 at 23:10, holloway said:

Of late i have started to notice that corvids are now beginning to see duck nest tubes  as recommended by Basc and others as an easy meal ticket .They have at least locally ,apparently learnt that they can negate long fruitless hours of searching  for nest by merely staking out these man made constructions ,or at least maintaining a regular watch on the proceedings within.

 As we all know corvids are not stupid and i think all we have done with nest tubes is advertised potential nest sites and easy pickings ,time will tell if this happens all around the country .   I personally would not advertise the use of such artificial structures as it is now resulting in carnage ! please monitor your own tubes and give feedback ,some areas will probably take a little time but i am sure in time nest tubes will be largely discredited.

 

Not had any issues on our with Corvids raiding them 

We have circa 30 / 35 and this year they have been so well used i have refurbed once or twice in the season - produced hundreds of ducklings !

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