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

Stephen Dalton / Yellow Crazy Ant (Anopolepsis gracilipes); an increasing environmental menace in Seychelles, Christmas Island and other areas around Indian Ocean. Seychelles, March.

Ingo Arndt / Yellow Crazy Ant (Anoplolepis gracilipes), an invasive species, receiving nutrition from scale insects, Christmas Island, Indian Ocean, Territory of Australia

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), Christmas Island National Park, Christmas Island, Australia

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

Stephen Belcher / Blue Crab (Discoplax hirtipes) carcass, death caused by Yellow Crazy Ants (Anoplolepis gracilipes), Christmas Island National Park, Christmas Island, Australia

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) biologist Fionnula Napier looking for ants, Christmas Island National Park, Christmas Island, Australia