This is a parody of the trademark gag of Yagi Masumi of Savanna (a comedy duo), "ブラジルの人聞こえますかー？".

The title of the post (さばんなのヤギ) can be read as both "a goat of the savanna" (サバンナの山羊) and "Yagi of Savanna" (サバンナの八木).