The dog of Serra de Aires  is a medium-sized breed of the herding dog type, and is one of the indigenous regional dogs of Portugal. Called the Portuguese Sheepdog in English, the original name refers to the Serra de Aires, a mountain near Monforte in the Alentejo region, often mistaken winth the "Serra d'Aire" 

 

The dog of  Serra de Aires  standing 45 to 55 cm at the withers, and 17 to 27 kg in weight. The dog's body is long and has a long coat without an undercoat, of medium thickness and described as having a "goat like" texture.