Bat poop and spiny lips

The first cool story came out a few weeks ago. In my 4th year undergraduate course “Environmental Stress Biology of Plants” I teach a few lectures on low nitrogen environments and the various ways that plants have adapted to get around this problem. In one of these lectures I cover the many neat types of carnivorous plants that eat animals as a way to obtain nutrients. A few years back I stumbled across a neat photo of a bat hanging around inside of a pitcher plant. This was a great example of a symbiotic relationship; presumably the bat gets a safe place to camp out during the day and the plant obtains nitrogen in the form of bat guano (feces). Biology is so awesome! The story gets even more interesting with the publication of a research paper a few weeks ago that figured out how the bat locates these potential nesting spots. It turns out that the shape of the plant’s opening takes advantage of the bat’s echolocation abilities and tells the bat exactly where to go in order to safely sleep in the plant.

The original article can be found here.

The second story is about frogs which are my favourite animals. While many frogs are poisonous (they produce toxins, but lack a delivery mechanism), this is the first description of frogs that are venomous (they produce toxins, and have a delivery mechanism). Two species of frogs were recently discovered in Brazil that have bony spines on their skull that pass through poison glands and there are some stunning photographs in the article. One of the authors had the unfortunate luck to experience the effectiveness of the toxin first hand while collecting a frog and experienced 5 hours of intense pain. The authors note rather dryly that this defense mechanism would be even more effective if delivered into the mouth of an attacking predator.

The original article can be found here.

Both of these articles likely had their genesis in a scientist noticing something really weird during field work. I always emphasize to my students that one of the best skills that a scientist can develop is a keen sense of observation.


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