Coconut rhinoceros beetle makes unexpected 'host shift' to Guam's cycad trees

Researchers have documented what biologists call a 'host shift' of the coconut rhinoceros beetle in Guam. The beetle, first documented as an invasive species in Guam in 2007, has been devastating the island's ubiquitous coconut palms and is now also burrowing into Guam's endangered native cycad tree, Cycas micronesica.