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About this Page
This is the last Animal Activity Chart that Jim prepared. I am removing this feature of the site until such time as I or an agent can figure out how he calculated this and devote ourselves to producing new charts.
Animal life (including human animals!) regulate their activities to a greater or lesser extent by the influence of the moon. When the moon is directly overhead, directly underfoot, or at right angles to any point on earth, animal activity is greatest. The chart displayed on this page predicts animal activity for this month based on these positions of the moon.
We'll be posting each month's chart in glorious color.
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Reading the Chart | Activity Periods | Fine Tuning the Chart | Animal Behavior | Geographical Considerations
Reading the ChartReturn to Chart
The charts are divided into a central light blue portion (day) and a gray shaded portion on either side (night). At the top of each chart are the hours of the day. The left side of each chart gives the date and the right side shows the phases of the moon for that month centered on the date they occur. To the right of the moon phases running vertically down the page is a wavy line signifying the moon's position either above or below the Ecliptic. When blue it signifies that the moon is above the plane - running high - and when red it signifies that the moon is below the plane - running low.
Activity PeriodsReturn to Chart
Running diagonally down the chart are vertically hatched red, blue and magenta bars which signify the
activity periods. The larger hatched areas of approximately 2 hours duration indicate the Major Periods
when the moon is at zenith (directly overhead and signified by blue hatching) or at antizenith (directly underfoot
and signified by red hatching). Both the red and blue hatching correspond to High Tide.
The smaller hatched areas (the green hatching) indicate the Minor Periods - when the Moon is at right angles to the observer - and correspond to Low Tide. By consulting both the date and the hour indicators at the top of the chart it is easy to discover the best fishing, hunting, or wildlife viewing times for any particular day.
Fine Tuning the ChartReturn to Chart
While the Major and Minor Periods are shown as lasting two hours and a half hour in length respectively their actual lengths vary from day to day from 1½ to 3¾ hours for the Major Periods and from 20 minutes to an hour in length for the Minor Periods. However the center of each period on the chart corresponds to the astronomical midpoint of any given activity period so by reaching your preferred fishing, hunting or observation area a half hour early you can take full advantage of any overrun beyond that given on the charts.
Animal BehaviorReturn to Chart
Fish are most active and feed most readily during the four days before the Full Moon and the four days after New Moon so these days (all other things being equal) will be most productive. In addition, activity periods that coincide with dusk or dawn are also exceptionally productive.
Note that the larger the body size the slower the reaction time to the moon, so large fish and most game animals (except birds) become active later in the Period's cycle than smaller individuals. Bear this in mind when using the charts.
For more on animal behavior, see Animals and the Moon
Corrections, and Meridian PointReturn to Chart
All times given here are corrected for Daylight Savings Time and based on Marion, Illinois (W 88° 56', N 37° 44') and computed by the US Naval Observatory in Washington, DC. For absolute accuracy you should add one minute for every 12 miles west of this point and subtract one minute for every twelve miles east you happen to be but for all of southern Illinois, southeast Missouri and western Kentucky the times given are sufficiently accurate so that you can disregard any corrections.
As a general guide, those of you on Eastern time should subtract one hour; on Mountain time, add an hour; on Pacific time add 2 hours.
Good luck and have a safe and productive year!
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Copyright © 2007 Jim Jung