The Erie Zoo held their annual “Cinco de Rhino” event Saturday. The event featured a variety of rhino-themed activities. Visitors also got the chance to donate to the International Rhino Foundation which works to help keep the five rhino species from becoming extinct. Two rhino species are critically endangered, meaning there are less than one hundred living in the wild. With each five dollar donation the visitors have been entered to win a prize pack including a behind the scenes tour of the rhinos for five people.