Caller ID says "Cal Academy", with area code from LA. We don't know if that is the same as "California Academy of Science" located in San Francisco? I would be surprised if a well known organization would make crank calls?
Anyway, when I picked up the phone, there's no person or recorded voice on the other end.
I called this number back and the automated voice that answered identified the organization as The California Academy of Science Donor Services. It immediately transferred me to an operator but I hung up. I'm assuming they want donations.