Re: [MDOsprey] A note of caution

PObrien776@aol.com
Fri, 5 Nov 1999 19:55:41 EST


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Mark, et al.

I'll try attaching my write-up of the 11/4 YBLO sighting.  It's in Simple 
Text.  If that doesn't work, I'll just rewrite the salient details.

Paul O'Brien
Rockville, MD 20850
pobrien776@aol.com

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Yellow-billed Loon=0DPatuxent River Opposite Seabreeze Restaurant =0DSt. Mar=
y's County, MD=0DNovember 4, 1999=0D=0DObservers: Paul J. O'Brien, Maryland=
=0D                 John Gatchet, Idaho=0D=0DAt approximately 12:30PM I obse=
rved a bird with the overall size and shape of a Common Loon, but exhibiting=
 a light yellow bill, floating, preening and occasionally diving in the rive=
r near the Calvert Co. shoreline.  It was located at the south end of a larg=
e grassy area, the southern of two such grassy areas on the opposite shore. =
 The day was clear and bright with the sun high but behind me.  My attention=
 was first drawn to the bill which stood out prominently, even at such a gre=
at distance.  I was using a Swarovski AT 80  HD spotting scope at 60 power. =
 Initially there was some shimmer that subsequently diminished.  There were =
four Common Loons working the near shore, but they never approached the YBLO=
 for direct comparisons.=0D=0DOverall the bird appeared to be in mid-moult f=
rom alternate to basic plumage.  The crown and nape were dark chocolate brow=
n which did not contrast with the brown back.  The throat and foreneck were =
whitish with a noticable dark brown neck ring just above the water line.  Th=
e brown crown and nape extended below the eye and down the sides of the neck=
 so that the auriculars were still in a dark field.  Thus the dark auricular=
 spot was not yet visible.  The distance was too great to discern the buffy =
scalloping on the back mentioned by Charlie Muise on his first observation o=
f Nov. 3, nor did I notice whether the high point of the back was over the s=
houlders or further back.  The outstanding feature of the bird was its bill,=
 which was thick at the base with an apparently straight culmen.  The lower =
mandible was straight for about half its length exhibiting a sharp gonydeal =
break upwards, thence straight to the tip.  The entire length of the bill wa=
s straw yellow with what appeared to be dusky areas near the base of the cul=
men and the base of the lower mandible at the throat.  To accentuate the upw=
ard thrust of the lower mandible, the bird held its bill slightly above hori=
zontal the entire time.=0D=0DAt about 1PM John Gatchet arrived to photograph=
 the Kelp Gull.  Having spent many years along the northwest coast he had se=
en many YBLOs and immediately confirmed the identification.  After about 10 =
minutes the bird began diving repeatedly and thereafter spent very little ti=
me on the surface, which John noted was typical YBLO behavior, and of the YB=
LO I observed Dec. 26, 1997 in Oswego, NY.  It worked its way upstream past =
the northernmost grassy area to a pair of docks.  Its surface appearances la=
sted only a few seconds, not enough time to get it in focus.  Finally, about=
 2:55, it took off and flew far downstream.  At first it gained altitude and=
 was well above the tree line, passing two signal towers, then descended, on=
ly to be lost from sight when it went below the tree line.  The distance cou=
ld have been consistent with the mouth of St. Leonard's Creek, where it may =
have been seen the next morning by Greg Miller.  In flight the bill again wa=
s the most outstanding feature, but there appeared to be two dark brown ring=
s on the fully extended neck.  The entire underside was white and the feet p=
lus an equal length of tarsus protruded beyond the tail tip.  Oddly, the fee=
t and tarsi appeared dusky pinkish.  Whether this was a trick of the lightin=
g or is some age or gender related feature is not clear.  The flying bird re=
sembled a Common Loon in size and shape but the flight seemed more ponderous=
.  The entire upper surface appeared uniformly dark.  I did not notice wheth=
er there were white primary shafts.                                         =
                                                                            =
                                                         =0D=0DPaul J. O'Bri=
en=0D12 Duke St. South=0DRockville, MD 20850-1014=0D301-424-6491=0Dpobrien77=
6@aol.com
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