Soubor:Tetrao tetrix x Tetrao urogallus.jpg

Toto dílo je volné také v zemích, jejichž právní řád chrání majetková autorská práva po dobu života autora a 100 let po jeho smrti.

Toto dílo je ve Spojených státech amerických dílem volným (public domain), protože tam bylo registrováno u U.S. Copyright Office nebo zveřejněno před 1. lednem 1929.

Toto dílo je volné také v zemích, jejichž právní řád chrání majetková autorská práva po dobu života autora a 70 let po jeho smrti.

You must also include a United States public domain tag to indicate why this work is in the public domain in the United States. Note that a few countries have copyright terms longer than 70 years: Mexico has 100 years, Jamaica has 95 years, Colombia has 80 years, and Guatemala and Samoa have 75 years. This image may not be in the public domain in these countries, which moreover do not implement the rule of the shorter term. Honduras has a general copyright term of 75 years, but it does implement the rule of the shorter term. Copyright may extend on works created by French who died for France in World War II (more information), Russians who served in the Eastern Front of World War II (known as the Great Patriotic War in Russia) and posthumously rehabilitated victims of Soviet repressions (more information).