Forth & Fourth

As in, "After the first three butterflies emerged, the fourth came forth."

Straight & Strait

Which direction did the boat sail between two outcroppings of land?
Strait.
Ba-dum-bum.

Gnu, Knew, New

This one goes out to Yvonne Treis, who emailed me recently to suggest it (possibly because she knows I like doing the animal ones best). In other words, she asked for this new post because she knew I'd want to draw the gnu.

Links & Lynx

As in, "You really shouldn't chain up a wildcat."

Vain, Vane, Vein

Oh, man, I can't think of a sentence that uses all three of these in an interesting way. You?