On dry days, some colonies forage less, so colonies are different in how they manage this trade-off between spending water to search for seeds and getting water back in the form of seeds.
在旱季, 有些蚁群觅食的少, 不同蚁群之间的差异 就体现在它们如何做权衡 如何在消耗更多水分去寻找食物 以及获得更多食物和水之间权衡