Resume en una frase este artículo sobre una canción famosa.
"I'm an Old Cowhand (From the Rio Grande)" es una canción cómica escrita por Johnny Mercer para el estreno de Paramount Pictures Rhythm on the Range y cantada por su estrella, Bing Crosby. La grabación comercial de Crosby se realizó el 17 de julio de 1936, con Jimmy Dorsey & his Orchestra para Decca Records. Fue un gran éxito en 1936, alcanzando el nº 2 en las listas de éxitos de la época, e impulsó enormemente la carrera de Mercer. Crosby volvió a grabar la canción en 1954 para su álbum Bing: A Musical Autobiography.
Los miembros de la Western Writers of America la eligieron como una de las 100 mejores canciones del Oeste de todos los tiempos.

Antecedentes
Mercer y su esposa atravesaban EEUU en coche camino de su ciudad natal, Savannah (Georgia), tras haber fracasado aparentemente en su intento de triunfar en Hollywood. A Mercer le hizo gracia ver a los vaqueros, con espuelas y sombreros de diez galones, conduciendo coches y camiones en vez de montar a caballo. Los vaqueros cantantes eran populares entonces en las películas y en la radio, y en 15 minutos, escribiendo en el reverso de un sobre, Mercer trasladó la imagen que estaba viendo a una canción cuya letra satírica desahogaba parte de su propia amarga frustración con Hollywood.

La letra, sobre un vaquero del siglo XX que tiene poco en común con los vaqueros de antaño, se ha incluido en algunas antologías de verso ligero.
I'm an Old Cowhand (From the Rio Grande), escrita por Johnny Mercer y grabada por Bing Crosby, es una canción popular de 1936 que satiriza la cultura vaquera de la época.
Summarize in one sentence this article about a famous song.
"I'm an Old Cowhand (From the Rio Grande)" is a comic song written by Johnny Mercer for the Paramount Pictures release Rhythm on the Range and sung by its star, Bing Crosby. The Crosby commercial recording was made on July 17, 1936, with Jimmy Dorsey & his Orchestra for Decca Records.[1] It was a huge hit in 1936, reaching the No. 2 spot in the charts of the day,[2] and it greatly furthered Mercer's career. Crosby recorded the song again in 1954 for his album Bing: A Musical Autobiography.
Members of the Western Writers of America chose it as one of the Top 100 Western songs of all time.[3]

Background
Mercer and his wife were driving across the US en route to his hometown, Savannah, Georgia, after having apparently failed to succeed in Hollywood. Mercer was amused by the sight of cowboys, with spurs and ten-gallon hats, driving cars and trucks instead of riding horses. Singing cowboys were popular in films and on the radio then, and within 15 minutes, writing on the back of an envelope, Mercer transferred the image he was seeing into a song whose satirical lyrics vented some of his own bitter frustration with Hollywood.[4]

The lyrics, about a 20th-century cowboy who has little in common with the cowpunchers of old, have been included in some anthologies of light verse.
I'm an Old Cowhand (From the Rio Grande), written by Johnny Mercer and recorded by Bing Crosby, is popular song from 1936 that satirizes cowboy culture of the time.