Photo by Corey Husic

Tuesday, April 3, 2012

Comparing two years

Here are a few dates for phenological observations at Lehigh Gap, Lehigh County, PA in 2011 and 2012. Note that last year we had a warm spell in February, then a colder March, but still had an early spring for some things. This year is really unusual.

First Cabbage White butterfly
April 4, 2011
March 12, 2012
First Tree Swallow
April 4, 2011
March 14, 2012
First Trailing Arbutus (at Sheep Mountain, Franklin Twp, Carbon County, PA)
April 9, 2011
March 22, 2012
First Field Sparrow song
April 11, 2011
March 19, 2012
First Serviceberry Blossoms
April 21, 2011
March 23, 2012
First Maple flowers open
April 4, 2011
March 15, 2012

It has gotten cooler and little more seasonable lately, but now we are in drought. If that lasts, it could have significant consequences. Stay tuned.

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