Working in conjunction with the World Wildlife Fund, a number of football clubs, including Serie A giants Roma and Championship sides Watford, Brentford and Middlesbrough, have tweaked their crests to highlight the increasing loss of wildlife around the world.
Villa's lion, Wolves' wolf and West Brom's throstle have all been removed for the day, while Roma will be without their Capitoline wolf. The WWF has also removed its iconic panda from its logo for the first time in its 60-year history.
The WWF has encouraged companies and sports teams to do away with their animal logos to "highlight the dramatic loss of biodiversity globally and the social and economical risks that it poses."
"We want to show what a world without nature would look like, because in less than 50 years, human activity has resulted in wildlife populations plummeting by an average of 68% -- and with every part of nature that we extinguish, we lose another important link to human and planetary health," said Felicity Glennie Holmes, executive director of communications and marketing at WWF International.
"Today we're joining forces with some of the world's best-loved brands to remove nature-related images from our logos to show how empty a #WorldWithoutNature would be.
"Globally, we need to reverse our direction and start restoring nature. And we need governments around the world to seize the opportunities this year to take action, so that we avert the risk of nature disappearing for good and our natural world thrives."