Critter Chat

In Critter Chat episode 8, hosts Marney Blair and Susan Brandt chat with Dr. David Herbst of the Sierra Streams Institute at Little Deer Creek in Pioneer Park in Nevada City as he dredged up an aquatic critter living in the sediment of the stream, a little dragonfly nymph. While we spend many hours of our lives pondering the agile aerial flyer that is the dragonfly, we rarely get to see the early stages of the dragonfly nymph which spends years developing underwater, molting 5-10 times, and eventually emerging to become the enchanting creature we see in the air. Dr. Herbst gives us lots of information about the intriguing lives of these little critters and their stream habitat. 

This nymph in particular, will become the elusive dragonfly, the Grappletail Dragonfly. With cryptic coloring and secretive manner, this dragonfly is very successful as an apex predator in both aquatic and aerial phases, eating insects, mating and lasting only til the end of the warm seasons of a year. 

In the second half of the show, we hear from experts, Greg Kareofelas of the Bohart Museum of Entomology; and UC Davis PhD candidate Christofer Brothers, who specializes in the predatory nature of the dragonflies, about what is unique about this particular Grappletail Dragonfly.

School teachers are encouraged to use Critter Chat for their students. Susan and Marney are developing teaching notes that include vocabulary words such as “teneral” and “metamorphosis” to bring concepts to students. 

Critter Chat airs on KVMR the first Wednesday of every month at 6:30-7:00pm. The Grappletail dragonfly episode will broadcast on Wednesday, November 6 at 6:30pm. See critterchat.org for podcast available the day of the show and more links to Grappletail Dragonfly resources.

Photo: Grappletail Dragonfly, courtesy Greg Kareofelas, Bohart Museum of Entomology, UC Davis