The Oakland Zoo welcomed people back for the first time on yesterday, after being closed since March. To visit, guests now must book tickets online, in advance, for a specific time window. The zoo is also capping attendance to 2,500 people per day. Normally, the Oakland Zoo might see over 7,000 a day during the summer, said Erin Dogan Harrison, a spokeswoman with the zoo. The zoo is implementing measures to prevent the spread of COVID-19, including requiring anyone over the age of three wear a mask and closing all indoor exhibits, restaurants and gift shops, Dogan Harrison said. #oaklandzoo #oaklandcalifornia #alwayssf