Examples from the repertoire that provide practice identifying different types of instruments.
Excerpts that only include a single instrument for ID.
Excerpts that include multiple instruments for ID.
See the NYU Theory Anthology for more examples for discussion and analysis (Other > Instrumentation).
Music By Women. Select the "Instrumentation" filter to sort by instrument or ensemble type, or click on "Score Reading" and select transposing instruments.
Timothy Chenette, Foundations of Aural Skills, "Musical Timbre: Instrument Identification" - See the playlists on the page.