When I was a graduate student at Ohio State, our lab would often get invited to give presentations to local schools and other interested groups. We would come in, give a talk that lasted between 30 minutes and an hour, and give the students time to ask us questions about the animals and what our lab did. We gave talks to groups that ranged from pre-school to high school in age, Boy Scout troops, conservation societies, etc. The talks were adjusted to fit the audience, but included general bat information, lots of cool bat pictures, and as much bat information as we could cram into the time allotted!
Since arriving in Georgia in 2001, I've been giving between 10 and 20 of these presentations per year. The majority of these presentations are in elementary schools and they tend to take place in the fall, but I'm willing to try and set up presentatations any time of year. The actual talks can be specialized to address the needs of your group. I have presented to groups ranging form pre-K up to adults, so I'm pretty flexible. The talks generally include a Powerpoint presentation showing bat pictures and teaching about bat ecology, behavior, and conservation. I also bring some demonstration devices with me. I have several "bat detectors" that allow me to show how we can use them to hear sounds that human ears can't detect. I also bring some bats that were stuffed by a taxidermist so that they can see them up close. I also generally bring handouts of various sorts that provide more information and fun activities. Lastly, in small groups I'm able to use a special device that lets a member of the audience pretend to be a bat themselves. Of course, there are always other options - please contact me for more information. I can be reached by email (firstname.lastname@example.org) or by phone at 678-466-4774.