Here is a recent article indicating that some marsupials are trichromats: Arrese, Catherine A., Hart, Nathan S., Thomas, Nicole, Beazley, Lyn D., and Shand, Julia (2002). Trichromacy in Australian marsupials. Current Biology 12(8) April 16 2002. 657-660.
********************** Cheri A. Budzynski, Ph.D. Assistant Professor of Psychology Heidelberg College 310. E. Market Street Tiffin, Ohio 44883 (419) 448-2000 ext. 2251 (419) 893-1986 ext. 4005 -----Original Message----- From: Deb Briihl [mailto:dbriihl@;valdosta.edu] Sent: Wednesday, November 06, 2002 9:23 AM To: Teaching in the Psychological Sciences Subject: Re: Bats and colour vision Here is what I found: Yes, all bats can see relatively well, some bats better than others. Microbats, which rely on echolocation, can see well during the day, and about as well as humans at night. Microbats are also thought to be color-blind. The megabat, which eat fruit or drink nectar from flowers, have exceptionally good color eyesight, similar to the vision of an owl or cat an night. Most megabats lack the ability to echolocate and therefore rely totally on their eyesight when foraging for fruit. And if you want to know the vision of a cat http://videoforcats.com/catvision.htm Info about bats from http://www.wildbirdsac.com/bat_info.html At 01:40 PM 11/5/2002 -0500, you wrote: >The other day in class I was discussing colour vision and the fact that >only primates among mammals are trichromats. I mentioned the theory >that this conferred an evolutionary advantage in spotting tropical >fruit (red) among the leaves (green). > >A student asked whether fruit-eating bats therefore also had >trichromatic vision. Good question. I said I thought not, because they >were nocturnal, weren't they? > >According to an on-line review of the book _Bats_ by Phil Richardson, >I'm wrong. It says "Megabats eat mainly tropical fruit; both their keen >sense of smell and their color vision enable then to detect one >fruiting tree among thousands". > >But what this doesn't tell me is whether they're trichromats, which is >what the theory would predict. Further web-searching didn't help. > >Anyone know? > >Stephen ______________________________________________________________ >Stephen L. Black, Ph.D. tel: (819) 822-9600 ext 2470 >Department of Psychology fax: (819) 822-9661 >Bishop's University e-mail: [EMAIL PROTECTED] >Lennoxville, QC J1M 1Z7 >Canada > >Dept web page at http://www.ubishops.ca/ccc/div/soc/psy >TIPS discussion list for psychology teachers at >http://www.frostburg.edu/dept/psyc/southerly/tips >_________________________________________________________ > > >--- >You are currently subscribed to tips as: [EMAIL PROTECTED] To >unsubscribe send a blank email to [EMAIL PROTECTED] Deb Dr. Deborah S. Briihl Dept. of Psychology and Counseling Valdosta State University Valdosta, GA 31698 (229) 333-5994 [EMAIL PROTECTED] http://chiron.valdosta.edu/dbriihl/ Well I know these voices must be my soul... Rhyme and Reason - DMB --- You are currently subscribed to tips as: [EMAIL PROTECTED] To unsubscribe send a blank email to [EMAIL PROTECTED] --- You are currently subscribed to tips as: [EMAIL PROTECTED] To unsubscribe send a blank email to [EMAIL PROTECTED]
