These primates composed and snapped the photos themselves, unaided, on their own initiative. The providence of the camera doesn't make the camera's owner the copyright holder, any more than using a rented camera makes the rental company owner of the resulting images. Composition and shot timing are the two primary creative acts in photography — the monkeys did both.
I'd argue that a tripwire or any other mechanism of photographer intent to have the animals photograph themselves, would be akin to setting the timer. But, he says it was accidental:
> One of them must have accidentally knocked the camera and set it off because the sound caused a bit of a frenzy, said Slater, 46.
If there is no creativity, there is no copyright. See Feist.
So the delay, and even who presses the button doesn't matter; the only thing that matters is who is responsible for the creative aspects of the photograph.
And, in this case, whether a non-human can, as a legal matter, create an "original work of authorship".
I have no idea if sorting through monkey photos would count, that's a question best addressed to an IP lawyer.
Stakeholders: 1) Owner of bag may claim that it was done on purpose. 2) Owner of camera for the trigger-like aim despite it only happening to camera under severe stress. 3) Baggage handler initiated despite being unaware that the camera took a picture at all until news came out. 4) Baggage company due to contract clause.