Pouter Pigeons
Pouter pigeons are characterized by their distinctive ballooning crops (the muscular pouches in their necks). When inflated, their globelike necks create a rather top-heavy aesthetic akin to a ball on a stick. There are several varieties of pouter, including the Brunner pouter (a common iteration), the English pouter (about 16 inches tall versus the Brunner's 13 inches), and the pygmy pouter (less than a foot tall).