Siegfried - Wagner

Richard Wagner (1813-1883), was a German composer of the Romantic era.
Wagner completed Siegfried in 1871.
To learn more about the composer, visit Richard Wagner on Wikipedia.
For more on the composition, visit Siegfried on Wikipedia.
Performance
Excerpts
Wagner - Siegfried audio excerpt:
Trombone Parts and Full Score
The full opera score of Siegfried is available on IMSLP.org.
NOTE: IMSLP provides access to public-domain scores and parts, with copyright status varying by country. Users are responsible for observing applicable copyright laws.
Trombone parts are available on IMSLP.org as follows:
Orchestra Audition History
Ranges and clefs by Part

More Wagner
Trombone Resources playlist of Wagner with Trombones in the instrumentation.