What's the difference between skirl and skirling?

Skirl

Definition:

• (v. t.& i.) To utter in a shrill tone; to scream.
• (n.) A shrill cry or sound.

Example Sentences:

Skirling

Definition:

• (n.) A shrill cry or sound; a crying shrilly; a skirl.
• (n.) A small trout or salmon; -- a name used loosely.

Example Sentences: