I have always found the smaller 3.5m males to be the most dangerous anyway.
How much difference is there in terms of bold ,aggressive behavior towards humans from the different sexes and sizes of crocs and at what size do you believe they start to see adult humans as prey..?..pretty general question of course but any ideas..?
I always tell people it is like the difference between grandpa and a teenager. Granpa is wise, experienced and patient. He will wait for the good opportunities. The just mature males are the teenagers. Full of hormones' fast, impatient and frankly just idiots(no offense to any teenagers
). To get attacked by the big ones you generally have to make a big mistake. To get attacked by the little one you only have to make a little mistake.
As for how big they have to be... That is arguable but i would say anything over 3m is a serious contender. And they are also more likely to come and check you out for territorial reasons than small crocs.
I have to say t hi ough that my oppinion is based on working with captive crocs not wild crocs.