Figure 1.

A: Image of Dasyscolia ciliata against a normal background. Notice that the ML wrongly targeted an open white background (bottom left) as the key feature. Image is from Karim Haddad ©. (https://www.inaturalist.org/photos/66075769). (b): Image of Ophrys apifera. Image taken from T.Voekler, CC BY-SA 3.0 <https://creativecommons.org/licenses/by-sa/3.0>, via Wikimedia Commons (https://commons.wikimedia.org/wiki/File:Flower_of_Bee_Orchid_Ophrys_apifera.png). (c): Image of Ophrys insectifera. Image taken from Bouba at French Wikipedia, CC BY-SA 3.0 <http://creativecommons.org/licenses/by-sa/3.0/>, via Wikimedia Commons. (https://commons.wikimedia.org/wiki/File:Insectifera.jpg). (d): Image of Ophrys bombyliflora. Image taken from Orchi, CC BY-SA 3.0 <http://creativecommons.org/licenses/by-sa/3.0/>, via Wikimedia Commons (https://commons.wikimedia.org/wiki/File:Ophrys_bombyliflora_Mallorca_01.jpg). (e): Image of Ophyrys speculum. Image taken from Carsten Niehaus CC BY-SA 3.0 <https://creativecommons.org/licenses/by-sa/3.0>, via Wikimedia Commons. (https://upload.wikimedia.org/wikipedia/commons/e/e8/Ophrys_speculum_d.JPG). Notice that ML mistakenly highlighted an out of focus flower at the bottom right of the main flower. (f): Image of Dasyscolia ciliata in a pseudo-copulation with O. speculum. Image taken from Pietro Niolu CC BY-SA 3.0 <http://creativecommons.org/licenses/by-sa/3.0/>, via Wikimedia Commons (https://pt.wikipedia.org/wiki/Dasyscolia_ciliata) Additional note: the circles represent the SURF highlights. The yellow circle refers to points in which the direction matters whilst the red circle disregards the direction. In terms of calculation there is not much of a difference in the selection and this is done automatically by the ML