Capability of Workers of the Ant Myrmica sabuleti to Categorize Numbers of Elements into Even and Odd

Categorizing numbers into even and odd is an ability held by humans that has recently been found to be also honeybees. We examined whether ants could make such parity discrimination. Working on the species Myrmica sabuleti, we learned of two colonies associate 2 black circles with a reward 5 these absence reward, as well other 3 same cues 4 reward. By collectively testing foragers each colony in separate tray front cues, it was first verified during three days if they dully ‘correct’ cue. Thereafter, while continued trained, were subjected nine successive choice tests, day pair different from one used learning process. The tests differed those train number size dots, cumulative surface perimeter their area (surfaces perimeters being maintained equal between cues) layout. A cue had (even or odd) training. tested time consistently responded conditioning. This sensitivity occurred 1 until 7. Discrimination 7 8 dots beyond ant capability.