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Can you
help Greg?
|
Would
you mind forming an opinion on the sex of the Aust Ringneck I caught at
home on Sunday from the 2 attached head photos. I believe it to be a
male, however I would appreciate your valued opinion(s). I decided to
put together a table of certain morphological data obtained from the
Guide, Peter Mawson’s original draft for Barnardius zonarius
zonarius and Forshaw’s parrot tome. Given that all 3 sources claim
B.z.z. does not have a red frontal band (or vestigial), my bird would
appear to be a hybrid. I would be very interested to hear your comments
on any significance attached to the presence or otherwise of the
underwing stripe. Although not mentioned on the attached table, my bird
also had pale yellow/white spots on the underwing coverts.
Sexing
adult Barnardius zonarius zonarius
|
Feature
|
Guide
|
P. Mawson original species draft
|
Forshaw
|
|
Crown colour - male
|
Deep black
|
Dark black
|
Dull black
|
|
Crown colour - female
|
Dull black tinged brown
|
(Lighter) black tinged brown
|
Duller, more brownish black
|
|
Head viewed from front -m
|
Wide, rounded crown
|
Wider & more rounded head
|
?
|
|
Head viewed from front - f
|
Narrow, flattened crown
|
Narrower & flatter head
|
?
|
|
Red frontal band
|
Lacking or vestigial
|
Lacking
|
No mention – inferred lacking
|
|
Belly colour
|
Yellow band
|
Yellow belly
|
Abdomen yellow
|
|
Underwing stripe
|
?
|
Present or not depending on age & sex
|
Female – sometimes present
|
|
|
|
|
|
|
WT (gm) - male
|
114-188, 163+20.96, n = 34
|
134-194, 167.3+12.4, n = 136
|
126 - 168
|
|
WT (gm) - female
|
130-175, 153.7+12.99, n = 14
|
124-180, 148.7+10.3, n = 97
|
121 - 143
|
|
WL (mm) - male
|
166-205, 186.7+9.91, n = 43
|
Not recorded
|
165-185, 175.4, n = 24
|
|
WL (mm) - female
|
170-230, 181.8+11.62, n = 25
|
Not recorded
|
164-180, 169.0, n = 13
|
|
TA (mm) - male
|
117-246, 216.8+21.58, n = 35
|
Not recorded
|
165-225, 196.9, n = 24
|
|
TA (mm) - female
|
122-229, 201.0+23.67, n = 23
|
Not recorded
|
157-204, 179.7, n = 13
|
Range, Avg+SD, #birds
Range, Avg+SD, #birds
Range, Mean, #birds
Waldja,
16/5/10
|
240-26582
(age 2+)
|
Morphology
|
M
or F
|
Reference
|
|
Crown colour
|
Dull uniform black
|
M
|
Forshaw
|
|
Head viewed from front
|
Rounded crown
|
M
|
All
|
|
Red frontal band
|
Present
|
n/a
|
Probable hybrid
|
|
Belly colour
|
Yellow band
|
n/a
|
All
|
|
Underwing stripe
|
Present (P2 – P7)
|
F
|
Forshaw
|
|
WT (gm)
|
164.6
|
M&F - tending M
|
Guide
|
|
WL (mm)
|
180
|
M&F - tending F
|
Guide
|
|
TA (mm)
|
203
|
M&F - tending F
|
Guide
|
|
|
|
|
|
Greg Marston |
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