This file is from Wikimedia Commons and may be used by other projects.
The description on its file description page there is shown below.
Summary
DescriptionTo Duck or Not to Duck screen capture 2.png
English: Screen capture of To Duck or Not to Duck, a 1943 Looney Tunes cartoon directed by Charles M. Jones, produced by Leon Schlesinger, and featuring Daffy Duck and Elmer J. Fudd. This screen capture shows Fudd's hunting dog, Laramore (whose name fits Fudd's speech impediment well), being knocked out of the audience during a boxing fight between Fudd and Daffy, by having various brickbats thrown at him by spectators from an all-duck audience that is clearly in collective opposition of Fudd. This screen capture is taken from a YouTube uploading of the cartoon in question by CC Cartoons, which offers high-definition restored versions of public domain cartoons with closed captions for distribution on YouTube. The video in question can itself be found here.
Date
Source
YouTube screen capture
Author
Leon Schlesinger Productions, produced for Warner Brothers.
The cartoon from which this screen capture was taken entered the U.S. public domain when its last rightsholder, the United Artists Corporation (successor in interest to Associated Artists Productions), failed to renew the original copyright within the required 28-year period.
Note that it may still be copyrighted in jurisdictions that do not apply the rule of the shorter term for US works (depending on the date of the author's death), such as Canada (70 years p.m.a.), Mainland China (50 years p.m.a., not Hong Kong or Macao), Germany (70 years p.m.a.), Mexico (100 years p.m.a.), Switzerland (70 years p.m.a.), and other countries with individual treaties.