Lack of rain.

vernal pool this year

This usually happens to some degree during the fall of most years.  This year seems that it has happened to a much greater degree.  The vernal pools are lower than usual.  This is a help to the shrimp eggs laid there in previous years as well as this year.  I am told that some shrimp eggs must undergo a complete dry-out before they can hatch.  If that is true, we should have a bumper crop of Fairy Shrimp next year!  These are what wikipedia calls "winter eggs."  They have thicker shells.  Wikipedia also says that there are "summer eggs" which hatch immediately after being laid.  Irregardless of the type of egg from which they hatch, I hope to photograph them.

same pool last year

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