I experienced the same phenomena about the fireflies last night. I thought it strange they would be so active on a rainy night.
E. Dorset, VT
> Date: Wed, 13 Jun 2012 07:38:16 -0400
> From: [log in to unmask]
> Subject: [VTBIRD] Tree Swallows and Fire Flies in Danby
> To: [log in to unmask]
> I have the same number of Tree Swallows are in past years, 8 boxes plus one box of Bluebirds and one box Wrens. They do seem to be experiencing more stress from other birds; Wren, Starling, House Sparrow and now the Kingbird this year is nesting in the yard. As the woods margin creeps closer it is bringing these other birds in. One box was lost to Sharp-shinned hawk. Eggs of another to I first thought Wrens but now think Starlings, that pair are re-nesting in first lost box. At Danby Pond and Farrell Access the Swallows are nesting in natural tree cavities out over the water. On another note at 9:30 pm last evening during rain shower thousand of fire flies blanketed the 5 acre meadow, at first I thought I had heat lighting!