probably is for the 2nd brood.
6/5/2011 (Sun) 7:30-8:30am
Park Drive East, Queens, New York City.
Info:
(1) The nest site of House Sparrow is selected by the male.
(2) Nests in trees are usually globular structures with a side entrance, a squashed ball 30 - 40 cm diameter.
source: http://www.sialis.org/hospbio.htm
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