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Its size, stature, and presumed behavior is similar to the modern Nile crocodile ("Crocodylus niloticus"). Because "V. robustus" shared so many similarities with the Nile crocodile there must have been a great deal of interspecific competition for resources between the two crocodile genera if they were to have coexisted with one another. It has recently been proposed that the Nile crocodile only migrated to the island from mainland Africa after "V. robustus" had become extinct in Madagascar.