something i've noticed lately, as my commute is coming more into line with
corvids returning to their nightly haunts: when they wander "home", they
seem to do so in proscribed paths, aerial rivers or roads as it were...

today made that abundantly clear: heading south on 148th in bellevue around
18:20, two rivers of crows were headed west-ish into the sunset. one was
doing so directly over larson lake, the other was west-bound along the north
side of interstate 90. both rivers contained upwards of 200 birds in
flotillas as small as 3-4, as large as 30-40, all following the same flight
plan...

as i passed over 405 on my own westward ho, there was still one more group,
this time a mere creek of perhaps 40-50 crows, and these were headed
directly northbound into the east side of the mercer slough...

a few weeks ago, headed northbound on 405, the river was on the east side of
the highway until it crossed 520, at which time it crossed the highway
almost dead-center with 520 and was seen for the next several miles on the
west side of 405 only... this river was headed southbound towards the same
general area of the mercer slough...

at no time did i see any flock larger than 2 crows headed in any other
direction. i infer from such small bits of evidence that, perhaps, there is
a corvid travelodge somewhere within the slough, with at least 750 birds,
and probably much larger by at least an order of magnitude... can anyone
corroborate this?

00 caren
http://www.parkgallery.org


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