Les Métamorphoses du Jour was a series of satirical illustrations published in Paris in 1829, created by J.J. Grandville, the French caricaturist who made his name by drawing human figures with animal heads engaged in recognizable social rituals. The conceit let him skewer bourgeois manners, professional pretension, and Parisian life with a lightness that kept the work from feeling like a pamphlet. Prints from this tradition are among the earliest examples of illustrated social satire as a standalone art form.