I've found him every time walking along the beach of the redwood biome. What was mentioned earlier works, build a stone trap. One foundation 4 door frames get him to chase you in then seal it. A random sabertooth tiger showed up during my tame attacked him and reset my timer, so beware.
From experience, fly with argie and drop them in a box and then take them. Passive tame btw. Mine kept getting attacked by terror birds and the tame bar would reset.
⤴️ so others morons like me will know.