Original file (1,280 × 1,024 pixels, file size: 140 KB, MIME type: image/jpeg)
Larval blackflies have fan like mouth parts that filter small particles from the water. If you squeeze the preserved head capsules gently you can see the fans open and close.
Click on a date/time to view the file as it appeared at that time.
|current||19:34, 31 January 2012||1,280 × 1,024 (140 KB)||Erin Hayes-Pontius|