The two main devices (symbols) in the Westlake blazon are the bars wavy and owl. The three main tinctures (colors) are azure, argent and owl .
The bright, strong blue color in Heraldry is known in English as azure, and similarly in other European languages – azul in Spanish, azurro in Italian and azur in French. The word has its roots in the Arabic word lazura, also the source of the name of the precious stone lapis lazuli 1A Glossary of Terms used in British Heraldry, J.H. Parker, Oxford, 1894, Entry:Azure. Despite this, those heralds who liked to associate colours with jewels chose instead to describe blue as Sapphire. According to Wade, the use of this colour symbolises “Loyalty and Truth” 2The Symbolisms of Heraldry, W. Cecil Wade, George Redway, London, 1898 P36.
Argent is the heraldic metal Silver and is usually shown as very pure white. It is also known more poetically as pearl, moon (or luna) 3Understanding Signs & Symbols – Heraldry, S. Oliver & G. Croton, Quantum, London, 2013, P53. In a sketch or drawing it is represented by plain, unmarked paper 4A Glossary of Terms used in British Heraldry, J.H. Parker, Oxford, 1847, P11.
The bar is a thin, horizontal stripe across the centre of the shield, usually in groups of two or three (any more and there would be confusion with barry, a treatment of horizontal lines of alternating colours). It is also possible to place decorative edges along bars, typically these are smaller than those found on the major ordinaries like the fess and pale, but have the same design and share the same meanings. The decorative edge pattern Wavy, is a typical example of this. For obvious reasons it is associated with both water and the sea 5The Symbolisms of Heraldry, W. Cecil Wade, George Redway, London, 1898 P40. Indeed, a roundel with alternating bars of azure and argent (blue and white) is known by the shorthand term fountain, representing water at the bottom of a well 6A Glossary of Terms used in British Heraldry, J.H. Parker, Oxford, 1894, Entry:Water. Other colours have also been used and the result can be very pleasing to the eye.
Birds of great variety occur throughout heraldry, at least in name 7A Complete Guide to Heraldry, A.C. Fox-Davies, Bonanza (re-print of 1909 Edition), New York, 1978, P233. The owl has long been associated with heraldry and is depicted in a clearly recognised aspect, always with its face to the viewer. 8A Glossary of Terms used in British Heraldry, J.H. Parker, Oxford, 1894, Entry:Owl It comes as no surprise that previous generations of heraldic writers ascribed to it the traits of “vigilance and acute wit”. 9The Symbolisms of Heraldry, W. Cecil Wade, George Redway, London, 1898 P77