I got a Wildview STC-TGL5IRX1 (5mp) bought from ebay (it came from the states, actually, lolol). This model has an IR flash. If we use IR flash cameras, they won’t see the light but they will see the red leds. Some don’t mind, because they are in a group or are still young. In these pictures you can see a group of wild european boars, and it’s obvious that they can see the leds lighting up (see first pic). After a while everything goes back to normal, and in the second pic you can see a little guy sucking and all others hitting the corn. In the last pic, the little ones are laid on the ground.
But not all behave like that. In this next sequence, an older boar doesn’t play ball, lol. He clearly sees the red leds and although is has eaten corn from that box in all nights before that, now he won’t get near it and goes away.
(I increased light when editing because the camera was a bit far off, hence the grainy pics)
IR flashes are a lot better IMHO because they are not as violent as the traditional flashs and the light is invisible (if the animal enters the feeder from the rear of the camera he will not see the leds until it is already too late to get out of the pic). IR flashs spook less.
So, if you intent to photograph dumb animals, any camera with flash will do it’s job, but if you want the big and cleaver meat to came back or to stay around I strongly recommend a IR flash.
Note: some traditional flashes may allow you to get faster pics, freezing the animal’s movements (less dragging) and bring more detail to the photo (because of the bigger light amount released), but all that may – and probably will – come with a cost.