Firebird
Firebird is a trumpet.
Overview
Type of trumpet with three valves and a trombone-style slide.
In detail
Firebird is a trumpet.
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
“Firebird (trumpet)”, English Wikipedia, consulted as further reading
Consult the sourcereference work · Reputable secondary · Wikidata
Wikidata, structured authority record Q2242097: Firebird
Consult the source