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Over about the past five years, at least, House Sparrows appear in our yard
come early October. I usually see them as they trade between a still-bare
deciduous tree in our yard and a neighbour's chicken run. There are usually
between eight to twenty birds, mature males and females, the latter seemingly in
the majority. After about ten days they disappear and we're sans sparrows until
early autumn.
Then, come March, groups of up to 20 birds appear on the power lines.
They seem to be all immatures/females. Within a few minutes, the group suddenly
dives into thickly-foliaged shrubbery. They reappear moments later and repeat
the behavior. After a week, no more spadgers until next spring.
John Layton
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