birch trumpet
birch trumpet is a natural trumpet.
Overview
Type of natural trumpet made of spruce covered with birch bark.
In detail
Materials recorded for it are birch bark.
It is associated with Sweden and Norway.
Sources
Each source is named with the standing the house places on it, so the evidence can be weighed rather than taken on trust.
reference work · Reputable secondary · Wikipedia
“Birch trumpet”, English Wikipedia, consulted as further reading
Consult the sourcereference work · Reputable secondary · Wikidata
Wikidata, structured authority record Q12339842: birch trumpet
Consult the source