For Colour Collective's 'limpet shell' prompt I decided to work the colour in as the sky, and feature a bird - Myrna loves to chase birds. A lot of them (especially magpies) tease her, flying just in front of her - but she doesn't really want to catch them, she just wants to chase them and make them fly. If you've ever seen the scene in Lady and the Tramp where Lady rushes out into the garden to chase away the birds... that is exactly what Myrna does.
When we're out walking and Myrna spots a bird sitting on a street lamp or a powerline she stares directly upwards at them, like this... I wanted to put the bird on a street lamp (as we have been mercilessly teased by a white cockatoo sitting way up high and squawking at us) but the height of a lamp didn't really fit with the format I've been using for these illustrations, and I didn't want to change it. So I put in a lower tree-branch and, after toying with a white cockatoo, a pink and grey galah, hanging upside-down for maximum tease-factor.
Adobe Photoshop CC on a Wacom Cintiq Companion 2