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three species (C. albicans, C. bicolor and C. fortis) and on variety of flying insects. Although, among conspecific workers, both the number of ommatidia and the Zf all Cataglyphis species are highly visually guided avigators, not relying on pheromone trails while foraging, so ow do differently sized workers compare in their visual erformances? First and foremost, how do the optics of the nts ’ compound eyes (e.g. optical parameters such as the size f the visual field, the angular distance between adjacent mmatidia, the radius of curvature of the eye, etc.) scale with e size of the animal? There are likely to be trade-offs between particular optical the ant’s visually guided behaviour. They might also shed some light on the developmental constraints of compound eye design, because the size and the shape of the eye are governe