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Sleepy Hollow, IL
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County:  Kane State: IL
Active Since: 2010 Observer: Haas
Lat/Long: 42, -88.3 Landsat WRS Path/Row: 23/31
MODIS TIle V/H: 4/11 MODIS Line, Samp: 948.59, 534.53

Site/Hive Description:

This site is located in wooded suburb of NW of Chicago and not too far from the historic Techny site, also part of this network. There are little to no agricultural crops in the foraging region.

The colony is in a small backyard apiary, in double deep 10 frame brood boxes. The queen for 2011 was raised in 2009.

The platform scale has .25 lb divisions, and is exposed on a wooden base.

The primary foraging sources are expected to be locust, linden (late June), clover and goldenrod (fall).

Nectar Flow Data 2011

Download Data File (comma delimited), download QA flag key



MODIS Subset Data (from the ORNL DAAC)
Red dots are the average of all pixels with acceptable quality (see landcover extract below for area covered).
Blue dots are the center pixel only (point is not plotted if the pixel is of unacceptable quality).



The Normalized Difference Vegetation Index (NDVI) is the ratio of the  difference between visible (red) and infra-red (IR) wavebands to the sum of these bands. 

NDVI = nir - red / nir + red

 NDVI provides an indication of the amount and vigor of vegetated  surfaces. 

 NDVI has been widely used with multiple generations of satellite data.


 The Enhnaced Vegetation Index (EVI) is a more complicated combination of wavebands compared to the more widely used index, NDVI.  The advantage of this newer index is improved sensitivity in high biomass regions and reduction in atmospheric influences.
pNIR = NIR reflectance
pRed = red reflectance
pBlue = blue reflectance
C1 = atmosphere resistance red correction coefficient
C2 = atmosphere resistance blue correction coefficient
L = canopy background brightness
G = gain factor

The MODIS sensor on the Terra satellite platform provides us with 16-day composite measures of NDVI/EVI throughout the year.  NASA distributes MODIS data from many of their distributed data centers.

MODIS Land Cover

MODIS Data Subset Citation:
Oak Ridge National Laboratory Distributed Active Archive Center (ORNL DAAC). 2007. MODIS subsetted land products, Collection 4. Available on-line [] from ORNL DAAC, Oak Ridge, Tennessee, U.S.A..

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Last Updated: November 21, 2016