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Not to push this fly thing pass its useful life. But are you all sure that
they are really black flies. Out here in God's Country black flies no
matter how large are of no consequence when you have small bombers called
deer and horse flies. Yes they are what they eat.
If you collect live foods in areas of boreal forest they are more call sand
flies as they like to hang out on sand hills where the temperatures are
higher and their metabolic rates are fast enough for them to chase down all
but Ben Johnson.
In discussions with and presentations to local fish keepers on collecting
their own live foods the airborne pest of little concern. What is of the
utmost concern is what you are bringing back to your tanks. I f you are new
to collecting find someone who has local experience or paid the cash and
get a good book for identifying aquatic insect larva, the little Golden
book on Pond Life is great if you can find it. While it may be obvious that
adult water beetles eat fish fry, so do their larva, called water tigers or
water scorpions. While most cyclops and daphnia are eaten by fish, some
cyclops are fish parasites. Damsel fly larva make good food but dragon fly
nymphs like fresh fry as well as fly. Small leeches are great once fish
discover them, most are plant eaters and will not hurt fish, just watch out
for the big colourful ones.
Well that's my swat at the subject, I am always available to go collecting
life foods, just call ahead so that I can contact the airport to determine
when the next cloud of horse flies come to town for the races.
Edmonton, Alberta, Canada
e-mail kealey at connect_ab.ca
I never met a fish I didn't like.