Pregnant while Pregnant – Or How to Breed Like a Rabbit

Can a female already in the late stages of pregnancy become pregnant again with a new set of offspring? Evidently the answer is yes, at least for European brown hares (Lepus europaeus). These hares are Read More...

Are Antlers Honest Signals?

Antlers are among the most spectacular examples of male secondary sexual traits in the animal world. They are shed and grow anew each year, and as such they are costly structures to produce. Large antlers are thought to have evolved through Read More...

Listening In – Bats Recognize Echolocation Calls of Other Species

Bat echolocation calls evolved to optimize the information returning as echoes. Consequently, bats that forage or roost in similar habitats tend to evolve similar calls. Because echolocation calls emitted by one bat can readily be overheard by other bats in the area, the question is Read More...