Capturing the EssenceOnce described by Sir David Attenborough as 'the best ornithological illustrator alive', William T. Cooper was a generous mentor to many wildlife artists. His willingness to share his knowledge and skills is epitomised in Capturing the Essence: Techniques for Bird Artists. First published in 2011, Capturing the Essence is a step by step guide that offers practical advice to observing birds, retaining the essential information and then painting them