Savannahs often greet people with head-butts, or an unexpected pounce. Some Savannahs are reported as being very social and friendly with new people, and other cats and dogs, while others may run and hide or revert to hissing and growling when seeing a stranger. Exposure to other people and pets is most likely the key factor in sociability as the Savannah kitten grows up.
Owners of Savannahs say that they are very impressed with the intelligence of this breed of cat.[citation needed] An often noted trait of the Savannah is its jumpingability. Savannahs are known to jump up on top of doors, refrigerators and high cabinets. Some Savannahs can leap about 8 feet (2.5 m) high from a standing position. Savannahs are very inquisitive, and have been known to get into all sorts of things. They often learn how to open doors and cupboards, and anyone buying a Savannah will likely need to take special precautions to prevent the cat from getting into things.
Water isn't a fear of the Savannah cat; many will play or even immerse themselves in water. Some owners even shower with their Savannah cats.[9] Presenting a water bowl to a Savannah may also prove a challenge, as some will promptly begin to "bat" all the water out of the bowl until it is empty, using their front paws.
Vocally, Savannahs may either chirp like their Serval father, meow like their domestic mother, or do both, sometimes producing sounds which are a mixture of the two. Chirping, when present, is observed more often in earlier generations. Savannahs may also "hiss"—a Serval-like hiss is quite different from a domestic cat's hiss, sounding more like a very loud snake hiss, and can be alarming to humans not acquainted to such a sound coming from a cat. Hissing, and even aggressive behavior which involves hissing, is more frequent in F1 or occasionally F2 generations, and may subside or disappear as the cat is socialized.
Savannahs are considered one of the larger breeds of domesticated cats. Their tall and slim build gives Savannahs the appearance of greater size than their actual weight.[6] F1 hybrid and F2 hybrids are usually the largest, due to the stronger genetic influence of the African Serval ancestor. Male Savannahs tend to be larger than females. Early generation Savannahs may weigh 10 to 25 lbs. Size is also very dependent on generation and sex, with F1 male cats usually being the largest. Later generation Savannahs are usually between 8-17 lbs. Because of the random factors in Savannah hybrid genetics, there can be significant variation in size, even in one litter. Some breeders report Savannahs in excess of 30 pounds.
The coat of a Savannah depends a lot on the breed of cat used for the domestic cross. Early generations have some form of dark spotting on a lighter coat, and many breeders employ "wild" looking spotted breeds such as the Bengal and Egyptian Mau for the cross to help preserve these markings in later generations. The International Cat Association (TICA) breed standard calls for brown spotted tabby (cool to warm brown, tan or gold with black or dark brown spots), silver spotted tabby (silver coat with black or dark grey spots), black (black with black spots), and black smoke (black tipped silver with black spots) only.[7] In addition, the Savannah can come in nonstandard variations such as the classic or marble patterns, snow coloration (Point (coat color)), and blue or other diluted colors derived from domestic sources of cat coat genetics.
The overall look of an individual Savannah depends greatly on generation, with higher-percentage Savannah cats often having a more "wild" look. The domestic breed that is used will influence appearance as well. The domestic out-crosses for the Savannah breed that are permissible in The International Cat Association (TICA) are the Egyptian Mau, the Ocicat, the Oriental Shorthair, and the Domestic Shorthair. In addition, some Savannah breeders use "non-permissible" breeds or mixes such as Bengal (for size and vivid spotting) and Maine Coon cats (for size) for the domestic parentage. A Savannah's wild look is often due to the presence of many distinguishing Serval characteristics. Most prominent of these include the various color markings and tall, erect ears. The bodies of Savannahs are long and leggy—when a Savannah is standing, their hind-end is often higher than their shoulders. The head is taller than wide, and they have a long slender neck.[4] The backs of the ears have ocelli, a central light band bordered by black, dark grey or brown, giving an eye-like effect. The short tail has black rings, with a solid black tip. The eyes are blue as a kitten (as in other cats), and may be green, brown, gold or a blended shade as an adult. The eyes have a "boomerang" shape, with a slightly hooded brow to protect them from harsh sunlight. Black or dark "tear-streak" or "cheetah tear" markings run from the corner of the eyes down the sides of the nose to the whiskers, much like a cheetah's. These tear marks also help reduce glare from sunlight, which aids the Savannah's vision during hunting.