[tn-dragonflies] some numbers January 2014

  • From: Rconnorsphoto@xxxxxxx
  • To: tn-dragonflies@xxxxxxxxxxxxx
  • Date: Sat, 8 Feb 2014 14:03:42 -0500 (EST)

Chilly Winter Greetings TN Dragonfliers,
 
A look at Odonata Central records for Tennessee as of January 15,  2014.
 
For 2013 for the 95 TN counties, the average number of odes recorded per  
county is at 35.4 species per county, up from 34.5 the previous year (2012). 
Of  course it takes 95 records to raise the average one full point, so we 
submitted  only slightly less than that. 
 
Basement counties are 19 at 19 or less, that is, there are 19 counties with 
 fewer than 20 recorded species. And there are now just 6 counties in 
single  digits. Or to look at it another way, we still have 6 counties  in 
single 
digits! But we have not been at this very long, and if our  ranks are few 
then slow progress is to be expected. By comparison the average  number for 
Butterflies is now over 50 per county!  
 
 
The leading county is still Blount at 86, others close are Sullivan (75),  
Cumberland (74) & Davidson (71). More thoughts on Blount Co. in another  
post.
 
Just in case you are interested in this format, I have attached  TN 
counties lists, amended from last winter's lists, one in alphabetical order  
and 
another from least to most. There may be those among us with better math and  
computer skills to deal with the numbers and statistics and  distribution, 
and I'd welcome any other perspectives. I miss David Trently's  Species 
Not-Seen page from a few years ago.
 
Looking forward to warmer weather and flying odes to chase.
 
Richard Connors
Nashville

Attachment: DFs counties 2014Av.doc
Description: Binary data

Attachment: DFs TN counties 14A.doc
Description: Binary data

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  • » [tn-dragonflies] some numbers January 2014 - Rconnorsphoto