I presume it was one of Bully's children you saw in the thorn-tree, Peter.
"The Burgess Bird Book for Children" by Thornton W. Burgess
Dickie flew up into a tree, and so he was safe, but Bully couldn't fly, though he hopped away.
"Bully and Bawly No-Tail" by Howard R. Garis
The bully fired both guns, but the bullets went wide as he fell like a tree, striking the corner of the bar with his head.
"Roosevelt in the Bad Lands" by Hermann Hagedorn
On a wager, I have built a bully fire from a green tree of white ash, one match, and no dry kindling.
"Scouting For Girls, Official Handbook of the Girl Scouts" by Girl Scouts