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Several people have mentioned lots of houseflies being active to feed our early arriving fly-eating migrants like swallows, as Ron did below. But do birds actually eat House/Cluster-type flies? I have never noticed any birds feeding on them even when there seems little else available- their larvae (maggots) yes, but not adult Muscidae (Houseflies and kin). I can't find much online that addresses this question. Nancy On 2015-04-15, at 10:04 AM, Ron Wilson <solidago123@gmail.com> wrote: > Good point Fritz. It would so neat to have tags on the birds to know for sure who is who. > Maybe someday .... > > For the time being warmer temp and lots of house flies around means they'll be able to feed well in this area. > > Ron > > > > On Wed, Apr 15, 2015 at 9:50 AM, Fritz McEvoy <fritzmcevoy@hotmail.com> wrote: > Hi Ron and All, > There's a good chance the Tree Swallows you observed at your boxes will move on in a few days and 'your' Tree Swallows don't arrive for a few more weeks. I usually get a number of early arriving Tree Swallows here a few weeks before breeding season starts that depart after a few days feeding and checking out the boxes and feeding. > It's my theory (and I could well be wrong) that these newly arriving Tree Swallows breed further north (in my case Newfoundland) and, like many migrating species, stop along the way to rest and feed until warmer weather and food sources are prevalent enough for them to move on to their real breeding location. > These Tree Swallows may stay and breed; but don't be surprised if they move on after a short stay and 'your' breeding Tree Swallows don't arrive for awhile yet. All the best. > Fritz McEvoy > Sunrise Valley CB (near Dingwall) > > > Date: Wed, 15 Apr 2015 08:43:55 -0300 > Subject: [NatureNS] Tree Swallows at nesting box- Somerset NS > From: solidago123@gmail.com > To: naturens@chebucto.ns.ca > > > "My" Tree Swallows returned to the yard this morning and have obviously laid claim to one of the nesting boxes. They have been going in and out of the box and perching on top. > > Their return is 7 days earlier than last year. > > Ron Wilson > Somerset NS >
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