The Burmese cat is a muscular, social companion often described as a brick in silk.

Nature · Published 3 October 2026 Swipe more like this →

In short: Originating from a single cat named Wong Mau brought to the United States in 1930, the Burmese is famous for its puppy-like personality and vocal nature. Yet, this breed is defined by two distinct standards—American and European—and faces significant genetic challenges due to its limited ancestral diversity.

The modern Burmese lineage traces back to a dark female cat, Wong Mau, imported to San Francisco in 1930. Joseph Cheesman Thompson, who brought her over, believed her build differed enough from the Siamese to establish a new breed. By breeding her with a seal point Siamese and subsequently with her own offspring, breeders created the foundation of the Burmese. Formal recognition by the Cat Fanciers' Association (CFA) arrived in 1936, though the breed's path was turbulent; extensive outcrossing to Siamese cats initially overwhelmed the original type, leading to a decade-long suspension of recognition that was only permanently lifted in 1954.

Today, the breed is split into two distinct types: the 'contemporary' American Burmese and the 'traditional' European Burmese. The American version is stockier with a broad head and rounded features, while the European type features a more slender body and a wedge-shaped head. This divergence is so pronounced that some registries treat them as separate breeds. Despite their physical differences, both types share a reputation for being exceptionally people-oriented, playful, and vocal, often forming intense, dog-like bonds with their owners that make them ill-suited for long periods of isolation.

However, this focus on specific breed standards has come at a biological cost. A 2008 study led by Dr. Leslie Lyons at UC Davis revealed that the American Burmese possesses the second-lowest level of genetic diversity among all cat breeds studied. This lack of diversity is linked to serious health issues, including immune system problems and smaller litters. Furthermore, the breed is predisposed to specific conditions such as hypokalaemia, gangliosidosis 2, and feline orofacial pain syndrome. In the American lineage, a specific gene mutation can even lead to fatal head malformations, highlighting the complex trade-offs involved in maintaining such a highly refined pedigree.

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