aR 
Pode 
Pruare IIL. 
. Hyoid of Flicker (Colaptes auratus) (adult, x 2). 
. Hyoid of Flicker (Colaptes auratus) (recently hatched, x 2). 
. Hyoid of Red-naped Sapsucker (Sphyrapicus varius nuchalis) (xX 2). 
. Tongue of recently hatched Downy Woodpecker (Dryobates pubescens) 
(x 4). 
. Tongue of fully-fledged nestling of Downy Woodpecker (Dryobates pubes- 
cens) (X 34). 
. Tip of tongue of fully-fledged nestling of Downy Woodpecker (Dryobates 
pubescens) (X 6). 
. Tip of tongue of adult Downy Woodpecker (Dryobates pubescens) (Xx 6). 
. Spines from dorsal tract of tongue of Red-headed Woodpecker (Melanerpes 
erythrocephalus) (greatly enlarged). 
- Spines from dorsal tract of tongue of Ladder-back Woodpecker (Dryo- 
bates scalaris) (greatly enlarged). 
44 
c 
