The aphids don’t want to be lunch–so how do they avoid becoming a mouthful when an herbivorous animal tries to eat the plant they live on? A new study published in Current Biology finds a simple solution–the heat and the humidity of the goat’s breath triggers the insects to drop off the plant.
Spanish researchers have found evidence that the combination of behavior and gravity may determine the itty-bitty body size of some orb weaver males. The males use “bridging”, or crawling along a single strand of silk to another location, to get around, a behavior that appears to favor smaller size. Females, however, are larger because this gives them a reproductive advantage: producing more eggs. This has led to what is called extreme sexual dimorphism, or large differences in size between males and females.