I found a Pine Siskin fledgling yesterday in Woodstock. It had a half 
grown tail. and nearly fully grown primaries. It could only fly about 5 
feet at a time. I flushed it out of a ditch along the road in my 
neighborhood.
So,observations of gathering nest material and brood patches now jumps 
to nesting for sure, at least in Woodstock.
Keep your eyes open for actual nests!
Kent

-- 
Kent McFarland
Vermont Center for Ecostudies
PO Box 420 • Norwich, VT 05055
802.649.1431
http://www.vtecostudies.org/