Few animals brave the midday heat of the Sahara desert. An exception is the silver ant, which chooses this time of day to leave its nest and scout for food, typically the corpses of heat-stricken animals. Even the silver ant, however, must be careful: at such times they can become victims of the heat themselves.
The statement 'The cues that silver ants use to navigate become less reliable as the afternoon progresses' least helps to explain the silver ant's choice of scavenging times.