It's interesting that you characterize it as a "war" rather than passioned responses. There are a multitude of suggested "guidelines" with respect to ethical approaches to WL photography. This article provides a well mapped out strategy as well as links to various organizations (
https://www.bhphotovideo.com/explor...-solutions/the-ethics-of-wildlife-photography). In your circumstance, the bird approached you on its own and you did nothing intentional to stress or interfere with it other than being there. So, from that perspective, I say you would be in the clear. Overall, I find the whole debate very challenging because most people will have their own preconceived notions based on their personal experiences. In my opinion, I've encountered just as many rude and unprofessional "birders" as I have photographers so I ascribe it more to the individual than any particular collective group.
Recently, when I was observing and shooting a lovely tri-color heron in FL a pair of folks with binoculars spied me and came running. Their behavior spooked the bird and I lost a really great opportunity. They seemed completely clueless that they had flushed the bird and rather than yelling at them I did my best to engage the pair, started a conversation, showed them some of my images and then started talking about ethical behavior. Did it resonate? Who knows, but the teaspoon of honey approach seems to have a better chance in changing opinions than hurling angry rants.
BTW, this snowy landed on a pole about 15-20 yards away from me. What was I to do? Melt away, turn into prey? After carefully snapping a few images , I did what any responsible person would do and that is I broke eye contact, moved slowly, and deliberately backed away in a non-threatening manner.
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