I found the pictures in the original emails by Steve Harder, and I've
attached them here once more.
Hendrik
On Tue, Mar 19, 2019 at 4:30 PM Jeff Gilligan <jeffgilligan10@xxxxxxxxx>
wrote:
Russ
It looked like the White-breasted Hawk (chinogaster). Where are the
photos from the Corvallis accipiter from last year in Oregon? Anyone?
Jeff Gilligan
On Mar 19, 2019, at 10:07 AM, Russ Namitz <namitzr@xxxxxxxxxxx> wrote:
Bicolored Hawk (*Accipiter bicolor*) is a separate species, resident to
Central and South America.
Jeff is probably referring to the "white breasted" Group of Sharp-shinned
Hawk (*Accipter striatus*) which occurs in Mexico and Central America
though the "rufous-thighed" Group of South America is also referenced.
The point is that it is a VERY cool sighting north of the wall (Game of
Thrones reference). Not quite as exciting as the 1st state record of Dusky
Thrush (11 day cold trail aside), but still pretty exciting.
Cheers,
Russ Namitz
PS: Just a quick note for those unfamiliar with how to read scientific
name abbreviations.
*Accipiter striatus *is the scientific name for the species of
Sharp-shinned Hawk.
*Accipiter striatus chionongaster *is the scientific name for a
particular subspecies of Sharp-shinned Hawk and, once referenced, will be
written as *A. s. chionongaster.*
*******************************************************************
White-Breasted Hawk (Chionogaster Group).
One subspecies. Storer (Storer 1952b
<https://birdsna.org/Species-Account/bna/species/shshaw/references#REF19896>)
interpreted a cline in pattern and color of underparts toward paler,
relatively unmarked populations in s. Mexico (*madrensis*) as a bridge to
the white underparts of *chionongaster *and therefore lumped this taxon
with other Sharp-shinned Hawk forms to the north. Also, because
*chionogaster *was in the past regarded as a race of *erythronemius* (along
with *ventralis*) of South America (e.g., Hellmayr and Conover 1949
<https://birdsna.org/Species-Account/bna/species/shshaw/references#REF21593>),
Storer (Storer 1952b
<https://birdsna.org/Species-Account/bna/species/shshaw/references#REF19896>)
believed all taxa should be merged under *striatus* . Monroe (Monroe 1968
<https://birdsna.org/Species-Account/bna/species/shshaw/references#REF57425>)
disagreed with this view and regarded all these taxa as separate species.
*A. s. chionogaster* Kaup, 1852: Chiapas, Mexico, south to Nicaragua.
Smaller than other Mexican subspecies. Adults with upperparts sooty (head)
to fuscous black; underparts white, with prominent blackish shaft streaks
on chin, throat, and breast; tibial feathering unmarked, light
ochraceous-buff.
Rufous-Thighed Hawk (Erythronemius Group).
Two subspecies, each sometimes regarded as distinct species (e.g., Sibley
and Monroe 1990
<https://birdsna.org/Species-Account/bna/species/shshaw/references#REF64578>
, Bierregaard 1994
<https://birdsna.org/Species-Account/bna/species/shshaw/references#REF48420>
).
*A. s. ventralis* Sclater, 1866: Resident of Andean w. Venezuela,
Colombia, and w. Bolivia. Highly variable, ranging from very pale below to
heavily barred, with some melanism, the latter possibly restricted to males
(Hellmayr and Conover 1949
<https://birdsna.org/Species-Account/bna/species/shshaw/references#REF21593>,
but see Wattel 1973
<https://birdsna.org/Species-Account/bna/species/shshaw/references#REF8598>).
Distinguished from both *velox* and *chionogaster* by deep rufous,
reddish chestnut, or cinnamon brown (Smithe 1975
<https://birdsna.org/Species-Account/bna/species/shshaw/references#REF61281>:
color no. 33) tibial feathers; lighter on belly than on throat and breast;
dark tail bands broader than paler bands.
*A. s. erythronemius* Kaup, 1850: Resident e. Bolivia, s. Brazil,
Paraguay, Uruguay, and n. Argentina. Similar to *ventralis* but ventral
barring, when present, more prominent and upperparts more uniform and
darker (back almost entirely slaty black or fuscous brown); somewhat
smaller than *ventralis* .
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