Jed, can you give any references or links to the evidence you cite? Evidence of damage and harm, not just more photos of birds being held in a certain manner? If there's "quite a bit" then some will be published and available for scrutiny. So far, nobody has posted anything on this thread that can be called evidence.
It's one thing to have concerns, which i sympathise with, it's another for them to be supported. I'm afraid that if someone wants to change the behaviour of a large number of people, and official recommendations, then a body of evidence IS necessary. The question has been raised, but nobody seems able to support it or prove that it's worth lsitening to.
I woudn't necessarily hold a raptor like that, and I think I've let my opinion be known on trophy shots(!), but what I don't want is for someone to be able to dictate what and what isn't permissable or 'correct' based on their own interpretations of photos taken when they were not present or in circumstances for which they have no experience.
I have a good deal of experience ringing birds, and seeing both good and bad practice all over the world, from several sites that these photos have come from, to my own ringing sites. Photos are evidence and are a very good way to monitor ringing practices, i think such photos should be welcomed, interpreted and commented upon where necessary.
The only evidence that i have is personal experience of badly handled birds,
there have been some references to personal experiences of these handling practices that have been negative. For an individual this is enough to ask questions. i have seen mishandling of passerines and of raptors and to think that someone has trained these pepole and spread bad parctice( even with innocent intentions) seems to me to be worth altering
The evidence you seek is probably impossible to obtain, evidence that the birds handled in a certain manner that suffered... i am assuming you mean died...not really possible or practical to obtain. this would require deliberate experiments on the two techniques, with follow up observations of behavior, flight, reproduction and survival. there are no species for which this data exists. Also there are no data for which the opposite exisits, that these exact practices do no harm. As you may know, these studies, should they occur will never get published.... and the question is not about scientific rigour- just a question from people with direct experience.
What we have here is personal experiences alone, this is indeed enough to raise a question. if you have had not such personal experinces then that is great, but not evidence for these handling techniques, if you have good experiences then please share them,
how do you handle raptors:
one handed?
two handed?
do you extract them, place them in a bag and ring by one leg whilst the bird is still in the bag (to keep it calm) and the release?
or do you give it a bird bag to hold whilst taking measurements?
do you measure full wingspan by holding 4 primaries ( photos on the web)??
I respect your views on trophy shots, i have not heard a single argument against these views. indeed i share these views, as do the majority of banding organisations. they should be avoided at all costs.
I do not wish to alter laws or rules, merely find out how to handle birds, what techniques work and what do not. i also want to hear from anyone that has experience with handling raptors... whatever their experience!