News Ecosystems Trust That Bird? A bit of future-think lets jays cooperate By Susan Milius December 11, 2002 at 12:34 pm - More than 2 years ago Share this:Share Share via email (Opens in new window) Email Click to share on Facebook (Opens in new window) Facebook Click to share on Reddit (Opens in new window) Reddit Click to share on X (Opens in new window) X Click to print (Opens in new window) Print A blue jay will cooperate with a buddy for mutual gain in food despite opportunities to betray the partnership, according to a new laboratory study. WHEN TO CHEAT. Animals often betray a partner in lab tests of cooperation, but under certain conditions, blue jays prove surprisingly steadfast.