Fwd: which hawk ?

To: "birding-aus (E-mail)" <>
Subject: Fwd: which hawk ?
From: Judith L-A via Birding-Aus <>
Date: Wed, 26 Aug 2020 16:34:08 +1000

3x beak & headshots ATTACHED

---------- Forwarded message ---------
From: Judith L-A <>
Date: Wed, 26 Aug 2020, 8:00 am
Subject: Fwd: which hawk ?
To: Judith L-A <m("","jlukin01");" rel="noreferrer noreferrer" target="_blank">>

Thanks, guys. As you see, the various measurements fall between the 2 species, & I remain uncertain. The bird is in the fridge so I can still photograph it, & will add close-ups of the head, foot & toes, beak, & tail-tip.

Greetings, all.

Here are measurements for an Accipiter found dead yesterday on the back landing here, beneath a hard-sheltered water bowl frequented by local passerines. These measurements I’ve compared with the following refs (& their diagrams), reaching an uncertain conclusion—
Menkhorst et al, 2017
Simpson & Day, 2004
Debus, 1998
Morcombe, 2000

The bird’s neck is broken. In the hand it feels broad-shouldered & “heavy”. Puzzlingly the beak & cere are all-black, with just the slightest whitish thread separating them.

Ventrally, chest-down the bird is finely barred rufous/white. There is a chestnut breast-band > slight dorsal half-collar. Dorsally the bird is brownish grey, & the head slate-grey. Brow-ridges are distinct. Tail is barred with a ventral bluish cast.

Measures are in CENTIMETRES, taken with a retracting metal household tape:

LENGTH  bill>tail-tip 37
WEIGHT  257g

WINGspan 56 ventrally (incl. chest)
  Single wingspread 30 dorsally (longest flight-feather > shoulder joint)

TAIL  appears notched —
  17.5 dorsally (from feather-base), 17 ventrally (from below cloaca)

BILL  1.5 (+cere=2)
Middle TOE  4.4 (incl. claw): appears longer by one-third than the neighbouring two. (Cannot be well-measured due to rigor, & damage.)

Two choices... What do you think?

SEQ 500m




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