December 2015. A question of the distance that Oryctes rhinoceros can fly.
A member provided the following: From memory there is reference in Linsey Gressitt's 1953 paper on the CRB (coconut rhinoceros beetle) in Palau. While working on the Rhino Beetle in Samoa 1969-1974, we had recovery of marked beetle flying at least 7 km. But the observations on colonization of small islets suggest that colonization across the sea was at least 20 km distance (but this is not direct evidence). An experiment was done on a suspended beetle and that it flew for 90 minutes - if you assume a speed of 10 kph this would put 20 km well within range. Of course this is direct flight - but observations suggest that they can orientate towards a light source from at least a kilometre.
Another member commented that there may not be enough consideration given to "normal behaviour of the insect in field conditions". Where host plants are present, the insects behaviour will be completely different to where no hosts are present. Recently a paper was published on the red palm weevil concluding that the beetle could fly 50 km! The authors did not consider that the behaviour of the beetle is influenced by the density and state of the host plants.
A PDF was sent from Guam.