This is the 2nd book in the Itty Bitty Buddybird series by Lynn Christian Hefley.  

When two young owls yell out rude comments to Wise Old Bird, the most respected owl of the forest, silence fills the air!
The wise professor may surprise you at how he deals with these two!  Then he gives the most important speech of his life!
Be ready to learn lessons to live by right along with all the owls of the forest, including Itty Bitty Buddybird!

Each book purchase comes with a cute little ornament of Itty Bitty Buddybird to remind children of the lessons he's taught them.

Itty Bitty Buddybird- Lessons To Live By