Pennsylvania Game News - September 2012 - 51

The Naturalist’s Eye
By Marcia Bonta

Of the 5,200 dragonfly species worldwide, at least 25 to 50 are migratory. The common green darner is one of them.

The Migration of Common Green Darners
FTER A HOT, humid day in early September, a large swarm of common green darner dragonflies hunted for food above the barn bank. Our son, Dave, had alerted me to the phenomenon, and we stood watching as the dragonflies darted about. Dave tried to catch one in my insect net, but every time he zigged, the dragonfly zagged. We also attempted to count them but, again, they were too fast for us to tally. We stood mesmerized by their aerial display — flying sideways, backwards and forwards as they hunted. Sometimes they hovered, like helicopters. Then, they would beat all four wings together and accelerate up to, according to researchers, 30 miles an hour. They can also stop instantly by lowering their abdomens and wings. Added to their flying expertise is their amazing eyesight. Those bulging eyes that
SEPTEMBER 2012

A

cover much of their heads have more than 28,000 facets, allowing them to see above, behind and around themselves. No wonder Dave couldn’t catch one. Because of the heat, I was almost certain we were watching a feeding swarm. On such days, common green darners might be pausing in their migration and waiting for a cold front from the north before pushing south. Or, on the other hand, they may have been permanent residents. Common green darners, like some of our birds, have two populations. The permanent residents mate in the summer and lay their eggs in leaves underwater. Their nymphs hatch in about three weeks and spend their winters in ponds and other slow-moving water. By June they have hatched into dragonflies and are coursing over water in search of food. The migrators mate in spring as soon as they return, and brand new dragonflies
51

Pennsylvania Game News - September 2012

Table of Contents for the Digital Edition of Pennsylvania Game News - September 2012

Pennsylvania Game News - September 2012
History of the Whitetail
Table of Contents
Going to the Ducks
A Tribute to Jon DeBerti
You Can’t Call It Back
Cover Story
Last Shot for Pap?
75 Years of Success in Pennsylvania
NASP Students are Hungry for More
Bears and Turkeys
A Natural Connection
The Other Migratory Game Birds
Field Notes
Conservation News
Off the Wire
Another View
The Naturalist’s Eye
Straight from the Bowstring
Fun Game
Lock, Stock & Barrel
Crossings
Pennsylvania Game News - September 2012 - Pennsylvania Game News - September 2012
Pennsylvania Game News - September 2012 - Cover2
Pennsylvania Game News - September 2012 - History of the Whitetail
Pennsylvania Game News - September 2012 - Table of Contents
Pennsylvania Game News - September 2012 - Going to the Ducks
Pennsylvania Game News - September 2012 - 4
Pennsylvania Game News - September 2012 - 5
Pennsylvania Game News - September 2012 - 6
Pennsylvania Game News - September 2012 - A Tribute to Jon DeBerti
Pennsylvania Game News - September 2012 - 8
Pennsylvania Game News - September 2012 - 9
Pennsylvania Game News - September 2012 - You Can’t Call It Back
Pennsylvania Game News - September 2012 - 11
Pennsylvania Game News - September 2012 - 12
Pennsylvania Game News - September 2012 - Cover Story
Pennsylvania Game News - September 2012 - 14
Pennsylvania Game News - September 2012 - Last Shot for Pap?
Pennsylvania Game News - September 2012 - 16
Pennsylvania Game News - September 2012 - 17
Pennsylvania Game News - September 2012 - 75 Years of Success in Pennsylvania
Pennsylvania Game News - September 2012 - 19
Pennsylvania Game News - September 2012 - 20
Pennsylvania Game News - September 2012 - NASP Students are Hungry for More
Pennsylvania Game News - September 2012 - 22
Pennsylvania Game News - September 2012 - Bears and Turkeys
Pennsylvania Game News - September 2012 - 24
Pennsylvania Game News - September 2012 - 25
Pennsylvania Game News - September 2012 - A Natural Connection
Pennsylvania Game News - September 2012 - 27
Pennsylvania Game News - September 2012 - The Other Migratory Game Birds
Pennsylvania Game News - September 2012 - 29
Pennsylvania Game News - September 2012 - Field Notes
Pennsylvania Game News - September 2012 - 31
Pennsylvania Game News - September 2012 - 32
Pennsylvania Game News - September 2012 - 33
Pennsylvania Game News - September 2012 - 34
Pennsylvania Game News - September 2012 - Conservation News
Pennsylvania Game News - September 2012 - 36
Pennsylvania Game News - September 2012 - 37
Pennsylvania Game News - September 2012 - 38
Pennsylvania Game News - September 2012 - 39
Pennsylvania Game News - September 2012 - 40
Pennsylvania Game News - September 2012 - 41
Pennsylvania Game News - September 2012 - 42
Pennsylvania Game News - September 2012 - 43
Pennsylvania Game News - September 2012 - 44
Pennsylvania Game News - September 2012 - 45
Pennsylvania Game News - September 2012 - 46
Pennsylvania Game News - September 2012 - Off the Wire
Pennsylvania Game News - September 2012 - Another View
Pennsylvania Game News - September 2012 - 49
Pennsylvania Game News - September 2012 - 50
Pennsylvania Game News - September 2012 - The Naturalist’s Eye
Pennsylvania Game News - September 2012 - 52
Pennsylvania Game News - September 2012 - 53
Pennsylvania Game News - September 2012 - 54
Pennsylvania Game News - September 2012 - Straight from the Bowstring
Pennsylvania Game News - September 2012 - 56
Pennsylvania Game News - September 2012 - 57
Pennsylvania Game News - September 2012 - 58
Pennsylvania Game News - September 2012 - Fun Game
Pennsylvania Game News - September 2012 - Lock, Stock & Barrel
Pennsylvania Game News - September 2012 - 61
Pennsylvania Game News - September 2012 - 62
Pennsylvania Game News - September 2012 - 63
Pennsylvania Game News - September 2012 - Crossings
Pennsylvania Game News - September 2012 - BB1
Pennsylvania Game News - September 2012 - BB2
Pennsylvania Game News - September 2012 - Cover3
Pennsylvania Game News - September 2012 - Cover4
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