August Phenology

by Carl Strang

Comparison of August first flower dates and first appearances by insect species continued to show the same trends that have been consistent through the season at Mayslake Forest Preserve. The 26 plant species that I could compare among years bloomed a median of 3.5 days later than 2009 and 5.5 days later than 2010.

The first hairy aster flowers on August 24 were one day later than in 2009, 6 days later than in 2010.

As was the case in July, insect first appearances were earlier in 2010 than in 2009 (by a median 7 days), and later than in 2010 (median difference 12 days). The sample size was only 10 in each case, though.

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2 Comments

  1. PointSpecial said,

    September 6, 2011 at 3:33 pm

    Off topic with this post… but I thought you would be interested in it:

    http://triblocal.com/lake-forest/2011/08/10/rare-pink-katydid-discovered-in-northern-illinois/

    Here’s a map of the area:

    http://www.lcfpd.org/docs/map_22712.pdf

    Lake County has actually done a really nice job of providing open areas along the various north/south rivers/branches. I live quite close to the Prairie Wolf Slough in Bannockburn/Highland Park which is another such area.

    • natureinquiries said,

      September 7, 2011 at 6:13 am

      Thanks for the link. Cheryl seems to imply that the pink one is a common true katydid, but it’s not. As far as I know only members of genus Amblycorypha turn up occasionally in pink. That one at first glance looks like an oblong-winged katydid.


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