Breeders of common Tumblers do not give them liberty, but release them from their loft only when they wish to see the birds perform, and, by feeding them immediately upon their return, coax and train them to return to the loft soon after being released. A good performer is soon exhausted by tumbling, and is quite willing to return to the loft in a short time. But not all birds of Tumbler stock are good and persistent performers, and often birds that do not perform prefer liberty for a longer period to the food that is waiting for them in the loft. Birds have sometimes been compelled to remain in the air for a long time. As a result of this treatment of poor Tumblers a type of Tumbler has been produced which will perform more or less when ascending or descending, but which, having risen to a high elevation, will remain for hours circling over its home and perhaps occasionally flying away and returning. Tumblers of this type can remain in the air for five or six hours. In flying them for sport the object is to see which flock will remain in the air longest. The tumbling habit was gradually bred out of the high-flying birds, and after a time many of them did not tumble at all. Such birds were then called Tipplers ("tipple" having in some English dialects the meaning of "tumble"). The modern Tippler Pigeon is a bird in which the tendency to rise to a great height and remain there for a long time has been developed to the utmost, as the tendency to return home from great distances has been developed in the Flying Homer. Performing Tumblers and Tipplers are usually bred for performance without regard to color, and the colors in a flock of the same breeding may be, and nearly always are, various. Exhibition stocks of Tumblers and Tipplers are bred in many distinct color varieties. [Illustration: Fig. 198. English Owl Pigeon[19]] [Illustration: Fig. 199. English Red Trumpeter Pigeon[19]] [Illustration: Fig. 200. English Saddle Trumpeter Pigeon[19]] [19] Photograph from E. R. B. Chapman, Stoneham, Massachusetts.