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Despairing of the feral parakeet situation (1 Viewer)

Steve Dudley

aka The Toadsnatcher
Jos, you probably picked up on the sloppiest bit of my summary (cos I'm in a rush trying to prepare for a conference in the morning!). The 'norm' in question in the provence study was the pair of EOs tolerating other species in close proximity. I dont have the paper to hand so cant give you the detail of the proximity but from memory it was under 1km of the EO nest.
 

Jos Stratford

Beast from the East
EO areas in northern Europe have evolved over thousands of years (as naturally as they could have done given Man's influence on the world) since the last ice age. Introducing any high level predator into an enviroment with no such top level predator (for thousands of years) is therefore not comparable.

Maybe I am simplistic here, but Hen Harriers as a species clearly have evolved alongside Eagle Owl. As a species, they have survived all these thousands of years alongside potential predators, be they foxes or Eagle Owls.

I would also say both Hen Harrier and Eagle Owl have been relatively good at adapting to the changing world as presented by man (other than when it is man blasting them with shotguns). Eagle Owls have successfully moved into inner cities, Hen Harriers into forestry plantations, etc. This is not evolution over thousands of years, it is change over short time periods responding to local environmental conditions. Given that, at a European level, there is nothing alien about an Eagle Owl to a Hen Harrier, I see no reason to suspect they could not co-exist in the UK. This argument that the Yorkshire birds haven't had time to evolve just does buy in my mind.


Besides, if we take Blimp's words regarding the Hen Harriers "stopping persecution would be very hard and extremely unlikely to happen", it is all academic, the harriers are not going to survive anyway. They huff and puff about Eagle Owls, bye bye go their harriers.
 

Jos Stratford

Beast from the East
I think you are missing the point.

In those places where Hen Harriers are present in reasonable numbers then I have no doubt they can coexist.

However, given a situation in which the Hen Harrier is struggling - for all of the reasons which have been given, and which I don't think anyone is denying - then ANYTHING that affects their numbers - eg Eagle Owls - could be enough to tip them over the edge.


I don't think I am missing the point, the cause of decline is gamekeepers, deal with the cause. Should we also control Foxes, Goshawks and any other potential predators within a kilometre or two of the harriers, or should we just sort out the real problem.

More than this particular Eagle Owl issue though, I have more serious concerns with the bloody-minded approach of Blimp who stated words to the effect 'all non-natives should be shot-gunned'. Simple madness, exterminating wildlife without reason, eg Little Owl, is not likely to win many 'neutrals' to the cause of fighting Hen Harrier persecution. Your average lay person, nor for that matter the likes of me, will see little difference in a desire to kill Hen Harriers and a desire to kill Little Owls.
 
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John o'Sullivan

Well-known member
Hello David ( a while ago now),

Thanks for taking the time for your reply,

"You seem to be saying that 'whatever is, is natural'. That is, that man is a part of the natural system, therefore whatever he does is 'natural' (whatever that means)."

Yes David, this is exactly what I mean.

"Following that reasoning, covering the countryside (which I am perfectly aware is man-made) with car-parks is natural, therefore ok."

No this would not be o.k. it would be a natural action but a strange thing to do. I have never said that everything that is natural including everything that humans do is ok.

"But surely the desire to conserve (which you say you don't believe in) is also a part of many people's make-up, and therefore must also be natural?"

I have never said I don't believe that many people have the desire to conserve. I believe this desire as far as it relates to a wide range of "conservation" practices is however based on a range of very limited and ultimately counter productive socially constructed (but natural) belief systems. It is however only the dominant belief system not the only possible belief system and not as far as I am concerned the "right" one.

I object to the primacy of the belief systems that manifest through the natural / unnatural construct because it leads to a simplistic identification of what is deemed "desirable" (or not) in environmental terms .

"Unnatural" practices are labeled as undesirable and "natural" events lauded.

Simplistic decisions are also made identifying what is a natural occurrence and what is not. So a species that relies on warmer human generated climatic conditions flying in to colonize (natural) is a good thing, whilst an escaped/introduced colonization of Eagle Owls (unnatural) is a bad thing.

They are both equivalent if you apply my belief systems. They are both ways in which the natural environment evolves and also both the direct result of humankind’s effect on the environment.

It follows from this line of reasoning that Eagle Owls are just as valid as Little Egrets and ultimately Hen harriers which are present in Britain via other equally valid "natural" processes.

The split itself and beliefs that assert that nature needs our help to conserve what is here now, probably derives from religious thinking that separated out the natural world from the human world and gave man "dominion" (back to star trek again) over the beasts of the field, the fish of the sea and the birds of heaven.

This is then followed up with belief systems that revolve around extinction being bad, as if it is "unnatural", that it must be avoided at all costs, when the evidence shows that throughout history (hundreds of millions of years before humankind had any influence on anything) evolution and extinction have gone hand in hand and you then combine this belief about extinction with a common human reaction to resist change (conservatism).

Following on from these belief systems are a range of emotional responses (despair being one of them) that further strengthen belief systems that something must be done, and something, a whole range of things are done, many of which are ultimately stupid/counterproductive/pointless. Expensive diversions away from meaningful support for the environment and the processes of evolution.

Things that not only are a waste of time but demonstrate to gamekeepers that they were right all along. If you want a population of species A you kill species B,C, D, E, F.

If conservationists get their we'll have gamekeeping on a global scale.

Global because the world is changing and in response to the changes with the current belief systems all sorts of species are going to be killed everywhere.
 

Jane Turner

Well-known member
No one has said that Eagle Owls will not eat Harriers. What has been said, and what is consistently being missed by those who chose to miss it, is that Eagle Owl predation on Hen Harriers does not affect the breeding population of Hen Harriers.

Just like Hen Harriers eating Red Grouse does no affect the breeding population of Red Grouse..... or Sparrowhawks eating Song Thrushes does not affect the breeding population of Song Thrushes.

Is really rather simple (sub A-level) ecology!
 

tophillbirder

Well-known member
The Bowland Eagle Owls most certainly wided out an entire Hen Harrier family. Hen Harriers are unnaturally low In England. Certainly this is directly due to game-keeping, however the presence of a predator which hasn't ocurred naturally in the vicinity in historic times, particulary escaped birds, can't be tolerated. As far as natural predators, conservation organisations have removed foxes before where they threaten sea bird colonies etc. This doesn't mean I condone shooting. As they are escapees trapping and returning to captivity would be my solution.
 

David FG

The Big Dipper
No one has said that Eagle Owls will not eat Harriers. What has been said, and what is consistently being missed by those who chose to miss it, is that Eagle Owl predation on Hen Harriers does not affect the breeding population of Hen Harriers.

Just like Hen Harriers eating Red Grouse does no affect the breeding population of Red Grouse..... or Sparrowhawks eating Song Thrushes does not affect the breeding population of Song Thrushes.

Is really rather simple (sub A-level) ecology!

Not on their own, no.

But when you add predation by Eagle Owls to habitat loss, persecution and all the other stuff then that predation COULD affect the breeding population.

If you have a population of 10 000 Hen Harriers, then the loss of 2 (say) won't make much difference.

If you have a population of 6, the loss of 2 is pretty significant.

It is really rather simple (sub GCSE-level) mathematics!
 

username

Well-known member
So let's say....the action of removing the 'offending' Bubo's takes place in 'the' sensitive harrier site....['good...about time' some might say]...and then....'those' same harriers are wiped out by 'another/other' predator that 'might' have been the favored prey of the removed EO's! 'If' any of these things were to happen...[all unlikely...but possible]..would those people in favor of getting rid of the Bubo's still be so sure of taking any such actions in the future....? I know that on the 'flip-side' these Bubo's could 'take out' such a small population of harriers....i do sympathize....it is a difficult situation....but...as has been highlighted many times...EO's are not the main problem!
....itz a kind of a 'dammed if you do...dammed if you don't' sort o thing to me....
 

Himalaya

Well-known member
A lot of the arguments are hypothetical. Lets look realistically about what the facts are with Eagle Owls in Bowland and Parakeets in london.

Where the EO nested in 2007 - the closest nesting raptor I believe was a Goshawk which may have been less than 1/2 a km away. As far as I remember HH were much higher up near the ridge and did not venture down into the bottom of the valley. 3 HH were found in the EO nest but those 3 could have been found in the nest of Goshawks, Peregrines too? I have even been told that on occasion L B B Gulls have stolen HH eggs too.

From what I gather HH numbers have not decreased in the last 3 years - the EO have been present since 2006 at least when they first attempted to nest. Who knows when they first arrived? The only thing stopping HH from establishing themselves in England is game keepers. Remove the threat of gamekeepers and HH will spread quickly over bowland and the other moors. if the mores become saturated maybe they will spread onto other habitats which they occupy in Europe. There are so many moors where HH could live but the birds go missing or nests damaged.

EO eat other BOP? So do Goshawks, Sparrowhawks, Peregrines. Even Buzzards have predated other BOP when they have the chance. EO may have predated Eagles but these are one off situations. At the same time Goshawks have been known to predate EO and injure them once again its probably a one-off situation.

I wonder how many HH disappear because of other BOP? The media has been quick to pick up the EO role but what about the Goshawks which also descend from escapes?

The EO have probably done the HH favour - their presence has increased interest in the FOB and HH. More people are more aware of them because the EO possibly poses a threat tothem.

The Buzzards dont seem to be shying from Whitendale. Dont HH have good hearing? Surely they will be more alert to any attacking EO as compared to other birds?

As EO numbers increase surely they will become more of a problem admittedly. There are already at least 7 out there, if none have been killed or died. At this rate the number of EO in Bowland could surpass the number of HH. The HH are spread out so therefore survive a better chance than is led to believe. i dont think they need to adapt to EO after all they have one greater and more cunning enemy - MAN.
 

ColonelBlimp

What time is bird?
Jos Stratford said:
"stopping persecution would be very hard and extremely unlikely to happen",

But I am only talking in the short term: if eagle owls really will have a negative impact on the harriers I would imagine that will happen in the short term, taking into account the likely inaction about persecution in the short term.

In the long term, action about persecution is more likely to happen. But that would be pointless if the harriers were put itno a tailspin by the owls, however unlikely that may be.
 

Jane Turner

Well-known member
Not on their own, no.

But when you add predation by Eagle Owls to habitat loss, persecution and all the other stuff then that predation COULD affect the breeding population.

If you have a population of 10 000 Hen Harriers, then the loss of 2 (say) won't make much difference.

If you have a population of 6, the loss of 2 is pretty significant.

It is really rather simple (sub GCSE-level) mathematics!



OK lets just accept that you just don't get it!
 

ColonelBlimp

What time is bird?
Jos Stratford said:
I have more serious concerns with the bloody-minded approach of Blimp who stated words to the effect 'all non-natives should be shot-gunned'. Simple madness, exterminating wildlife without reason, eg Little Owl, is not likely to win many 'neutrals' to the cause of fighting Hen Harrier persecution.

Alongside my statement I have so far laid up loads of qualifiers, e.g. this should only be done if the money/time is there, and the benefits outweigh the gains. This does not however the basic sentiment that invasive species are not good. To my mind, all invasive species have a negative impact on the native ecology to some degree-mediated in great part by their 'cuteness'.

We wouldn't be arguing so much about these owls if they had the charisma and stunning good looks of cane toads!
 

Jos Stratford

Beast from the East
Alongside my statement I have so far laid up loads of qualifiers, e.g. this should only be done if the money/time is there...

Your original sentence 'if it isn't native, get out the shotgun!' was not accompanied by 'loads of qualifiers'. Your first mention of time and money came only when criticised for this position.


To my mind, all invasive species have a negative impact on the native ecology to some degree-mediated in great part by their 'cuteness'.

We wouldn't be arguing so much about these owls if they had the charisma and stunning good looks of cane toads!

Only you refer to cuteness and charisma, it is irrelevant.
 

username

Well-known member
I guess this thread, at least, has served the purpose of highlighting how difficult it is to change/modify certain people's 'views' on this 'sort' of issue. Attempts at altering 'certain' perspectives on such matters is obviously an on-going/up-hill struggle....and it does beg the question...wot chance is there of altering a 'bad gamekeepers/landowners' view on BOPs in general?! I do hope that some, following this thread, will have had at least 'pause for reflection' on what they might have originally thought was a 'black n white' situation....[please no references to snowy owls]!

ps....perhaps a change of thread title might be in order?...'despairing of EO situation'...or...'despairing of knockin one's head against a brick wall situation'...?
 

James Bean

Well-known member
Jane, Have you been watching re-runs of 'House of Cards' again? I know, I may certainly think that, but you couldn't possibly comment... res ipsa loquitur.
 

ColonelBlimp

What time is bird?
Jos Stratford said:
Your original sentence 'if it isn't native, get out the shotgun!' was not accompanied by 'loads of qualifiers'. Your first mention of time and money came only when criticised for this position.

Yeah, i.e. it has been "so far" accompanied by qualifiers, not referring at all to the original statement being qualified.
 

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