Eat-ing their greens: The ants seemed to pre-fer lighter colours such as greens and yel-low to darker blues. (Mohamed Babu /​ Solent News & Photo Agency)

A good palette: Some of the ants even wan-dered from one colour to another, cre-at-ing new com-bi-na-tions in their stom-achs. (Mohamed Babu /​ Solent News & Photo Agency)

Ring of colour: An ant’s trans-par-ent abdomen shows the colour of the food they have eaten. (Mohamed Babu /​ Solent News & Photo Agency) 

http://designyoutrust.com/2011/08/06/tasting-the-rainbow-the-ants-whose-multi-coloured-abdomens-show-exactly-what-theyve-been-eating/