If you want to learn how to draw a pigeon follow this guide. Draw lines for a rough outline and then add a circle for the head.
Sketch in a beak and the neck, and then add an elongated body shape. Draw the tail and the legs and then a large pair of outstretched wings. Add a feather outline to the wings and detail the claws and eye.
Now add in more feather details to body and wings and use different shades of grey and white to color in. This is the easy way to learn how to draw a Pigeon.