Claudio Contreras / Crazy Yellow Ant (Anoplolepis gracilipes) in Red Mangrove (Rhizophora mangle) flower, invasive ant species, Magdalena Bay, Baja California, Mexico, February

Ingo Arndt / Yellow crazy ant (Anoplolepis gracilipes) receiving nutrition from scale insect, Christmas Island, Indian Ocean, Australian Territory

Stephen Belcher / Yellow Crazy Ant (Anoplolepis gracilipes) guarding Scale Insects (Tachardina aurantiaca), Christmas Island National Park, Christmas Island, Australia

Stephen Belcher / Yellow Crazy Ant (Anoplolepis gracilipes) guarding Scale Insects (Tachardina aurantiaca), Christmas Island National Park, Christmas Island, Australia

Stephen Belcher / Christmas Island Red Crab (Gecarcoidea natalis) and Blue Crab (Discoplax hirtipes) carcasses, death caused by Yellow Crazy Ants (Anoplolepis gracilipes), Christmas Island National Park, Christmas Isla...

Stephen Belcher / Christmas Island Red Crab (Gecarcoidea natalis) and Blue Crab (Discoplax hirtipes) carcasses, death caused by Yellow Crazy Ants (Anoplolepis gracilipes), Christmas Island National Park, Christmas Isla...

Stephen Belcher / Yellow Crazy Ant (Anoplolepis gracilipes) group killing Christmas Island Red Crab (Gecarcoidea natalis), Christmas Island National Park, Christmas Island, Australia

Stephen Belcher / Yellow Crazy Ant (Anoplolepis gracilipes) colony map looked at by ranger Peter Smith, Christmas Island National Park, Christmas Island, Australia

Stephen Belcher / Yellow Crazy Ant (Anoplolepis gracilipes) guarding red scale insects, Christmas Island National Park, Christmas Island, Australia

Stephen Belcher / Yellow Crazy Ant (Anoplolepis gracilipes), Christmas Island National Park, Christmas Island, Australia

Stephen Belcher / Yellow Crazy Ant (Anoplolepis gracilipes) pair guarding Scale Insects (Tachardina aurantiaca), Christmas Island National Park, Christmas Island, Australia

Stephen Belcher / Yellow Crazy Ant (Anoplolepis gracilipes) pair greeting, Christmas Island National Park, Christmas Island, Australia