You can find boomslang skin in two location on Pottermore.
The first is in Harry Potter and the Chamber of Secrets,chapter 11 moment 1 - there is some on the back shelf of Severus Snape's office which will appear after you have successfully completed a Swelling Solution.
The second location is in Harry Potter and the Goblet of Fire, chapter 35 moment 1 on the table at the back.
Chapter 5, 3rd moment in the 3rd zoom. You can find Boomslang skin in the same moment, right below the horn.
Boomslang was created in 1829.
Boomslang - comics - was created in 1988.
You have to sniff the boomslang skin to get out of the room of requirement on Lego Harry Potter.
The Boomslang is a venomous species of tree snake native to Africa.
in the tree
According to Wikipedia, the Boomslang is a snake, native and restricted to sub-Saharan Africa.
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Bicorn Horn and Boomslang Skin. It was Hermione that stole them.
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A boomslang is a type of snake belonging to the family Colubridae. It is known for its highly venomous bite and distinctive appearance, with its large eyes and slender body. The boomslang is native to sub-Saharan Africa.