Someone thought that Beaky Buzzard, depicted as dumber than a bag of hammers in a couple of meetings with Bugs Bunny, was worthy of his own series of shorts. Well, it's all according to how one looks at it.
"The Lion's Busy" carries a 1948 copyright, but wasn't released until 2 years later for reasons known only to WB. Kent Rogers, the uncredited actor who voiced Beaky in his earlier appearances, had passed away, so Mel Blanc took over the role, using a voice similar to that of a Native American in Porky Pig's adventure with "The Lone Stranger", a Lone Ranger parody.
Due to the 2-year time lag, I honestly don't believe it deserves to be filed under "Tooniversary". Do you?