The Presa Canario was developed on Tenerife and Gran Canaria in the Canary Islands to guard farms and to catch and hold cattle. The name roughly means Canarian catch dog. The breed nearly vanished in the mid-1900s before it was revived, and the AKC lists it in its Foundation Stock Service rather than giving it full recognition. Presas are massive mastiffs with a broad, square head and a short, coarse coat in fawn, brindle or black.
At home, many are calm and devoted, but a strong guarding instinct and suspicion of strangers are typical, and some dislike other dogs, especially of the same sex. In DC, that means planning for crowded sidewalks, neighbors and delivery visitors from day one, with steady reward-based training. Dogs vary, and many adoptable Presas are mixes, so behavior matters more than the label.