Getting very close to a Brown Shrike

I was waiting for small birds near a fruiting tree recently when this Brown Shrike perched at around 10 feet away, just beyond the MFD of my 400 2.8 IS + 2x TC combo.

This bird is about 7-1/2 inches in total length (from tip of bill to tip of tail), and nearly half of that length is the tail. I'd estimate the distance from the tip of its bill to the back of its head as around 1-1/2 to 2 inches.

Since I couldn't zoom out, nor back down (for fear of spooking the subject), I decided to just take a head shot. This was one of the rare times when I had too much reach.

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Brown Shrike (Lanius cristatus, migrant) 

 

Habitat - Common in all habitats at all elevations.

Shooting Info - Bued River, Rosario, La Union, Philippines, October 28, 2015, 7D + 400 2.8 L IS + 2x TC II,
f/5.6, ISO 320, 1/160 sec, 475B/516 support, manual exposure in available light, near full frame resized to 800x533.

High res 1500 x 1000 version

Pixel level view (aka 100% crop) of the eye area