Possible Clues:

• For the present it might take to the air, but it does take to the air
• It rises once a year to the delight of anglers
• Ephemerid
• Root around knowing one won't be here long
• It's possible for it to take off to escape the trout
• Ephemerid, a short-lived insect
• Short-lived spring insect prized by anglers
• Long-tailed pond insect
• Insect found hawthorn sharp
• Perhaps it may take off for the angler