A head shot captured the blue jay's intense stare,
Female Red-bellied Woodpecker
And the inquisitive stare of the female Red-belly.
Male Red-bellied Woodpecker
While only a close-up shot could show the extended tongue of the male Red-belly.
Wild Turkey Gobbler
Only a head shot would do justice to the bright red of the backlight illuminating a gobblers dewlap.
Sometimes when shooting with prime glass the subject becomes closer than you had anticipated. With no zoom capability the only options are either don't shoot or go for a head shot.