Who is here? 1 guest(s)
 Beach fly 2013-VIII-18 (= Proctacanthus coquillettii)
|
|
| John Carr |
Posted on 06-09-2013 12:29
|
 Member Location: Posts: 9773 Joined: 22.10.10 |
On a beach in California, USA near the Mexican border. August 18, 2013.
Edited by John Carr on 06-09-2013 23:18 |
 |
|
| Eric Fisher |
Posted on 06-09-2013 23:05
|
 Member Location: Posts: 435 Joined: 19.05.06 |
Proctacanthus coquillettii, male. Nice shot of this sand dune-loving fly limited to the southern part of the Colorado River drainage. |
|
|
|
| John Carr |
Posted on 06-09-2013 23:18
|
|
Member Location: Posts: 9773 Joined: 22.10.10 |
Thanks. Is beard color sexually dimorphic? I also saw a robber fly with white beard. |
|
|
|
| Eric Fisher |
Posted on 13-09-2013 07:19
|
|
Member Location: Posts: 435 Joined: 19.05.06 |
Yes, the female has a white beard and the body is paler in color (being gray, with the apex of the large ovipositor shiny black). The wings of the male have a large brown spot that covers most of the middle third of the wing, while the female has nearly entirely clear wing, with just a faint brown shadow in the middle third. Some males of Proctacanthus coquillettii have whitish beards. The intensity of the yellowish-orange color hairs in your male fly seems unusual, and most males have these hairs a much paler yellow color or even white. |
|
|
|
| Jump to Forum: |
but don't see the image in the post.
