Odonata.Bogfoot.net: a Site by Jim Johnson Contact: bogfoot (at) bogfoot.net
 
Search

 
Emergence of Anax junius - Common Green Darner
 
 










 
Below and on successive pages are photos of two emerging Anax junius (Common Green Darner) combined into a single sequence to illustrate the entire process. These photos were taken by Ken Tennessen in mid-September (9/13 and 9/17) at a pond in Waushara County, Wisconsin. In both cases, emergence began between 9:00 and 10:00 AM and the maiden flight occurred at about 3:00 PM. Air temperature was relatively cool at this time (50 to 65 F), and the process probably occurs appreciably faster at higher temperatures
 
1. Nymph is crawling out of water during mid-morning to begin metamorphosis to adult dragonfly (note swollen wing pads).
Emerging Anax junius, Common Green Darner
 
2. Head and thorax pushing out of exuvia.
Emerging Anax junius, Common Green Darner
 
3. Head and thorax nearly out.
Emerging Anax junius, Common Green Darner
 
4. Head and thorax are out.
Emerging Anax junius, Common Green Darner
 
5. Head and thorax completely out, legs and wings partly out.
Emerging Anax junius, Common Green Darner
 
6. Hanging upside-down, legs completely out; antennae held close to head as they were in the exuvia. This was about 20 minutes from the time the head split, and it stayed in this postion for 57 minutes.
Emerging Anax junius, Common Green Darner
 
Continue >