nizzard blizzard

What stilts-enthusiast King Birtram's patrol-cats prevent by guarding the Kingdom Of Binn's dike-trees night and day.

I take it that there is enough of a nizzard blizzard at egg-hatching time to keep the population of said snooty blackbirds fairly stable, since after his banishment, the evil Lord Droon was made to gaggingly make a meal out of one or more cooked specimens of said troublesome flapper three times a day.