You can use photoshop, camera phones or any type of camera as long as it is of a bird, and that can include types of birds like penguins, it doesn't have to fly.
Every photo submitted will be available for the crowd to rate once the submissions period has ended. You can see all the images uploaded to a contest, but will need to rate them to see how they’re ranked once the rating period begins.
Some contests on Photocrowd also have a judge. After the submission period closes the judge chooses their favourite images and writes some image reviews. The crowd and judge results will be announced on the same day.
For a more detailed explanation of how rating works, see our FAQs