This element of design is Negative Space. The hand isn't actually holding anything. It implies that there is a light bulb in the empty space. Negative space guides your imagination to finish the image.
Interesting Trivia - how long does that animal live? What is the average lifespan of a wolf? What about a woodpecker? This infographic looks at the lifespan of different species and how long they live.
Water Splash Photoshop Brushes via You The Designer. These are creative and unique in their own way. The fact that they are made from water is creative and interesting. These would be great logos for a water co.