Date: 2/12/18 10:33 pm
From: Nathaniel Wander <nw105...>
Subject: [obol] Willamette Lesser Scaup
Having been mostly missing for almost two weeks, Lesser Scaup are returning in numbers as of today.  There were sixty-odd  downstream of the Broadway bridge and two groups of 25+ between the Broadway and the Steel.
Anyone know what they feed on here?  Spilled grain from the elevator is clearly feeding Canadas and Mallards--maybe it also acts as fertilizer for plant life around the elevators and hence food for inyertebrates.  Scaup do eat vegetation on their breeding grounds, but they feed mostly on mollusks and the like, especially in winter.  I read somewhere that, unlike say Canada Geese, scaup don't particular fatten in winter, waiting till they get to their breeding grounds to acquire egg-making resources.
Nathaniel WanderPortland, OR
Max Planck is supposed to have said: A new scientific truth does not triumph by convincing its opponents and        making them see the light, but rather because its opponents eventually die        and a new generation grows up that is familiar with it.Andreas Wagner observed of Planck's remark: Science, like nature, advances one funeral at a time.  (Arrival of the Fittest, p.197)
 
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