Low-income Detroit residents and groups are eligible to receive zoo passes which allow free entrance to the Detroit Zoological Institute (and the Belle Isle Zoo, when open to the public). NCH receives a limited number of passes, so distribution is on a first come/first served basis. Please bring proof of your low-income status to any NCH location. For a 24-hour recording of special events and general information about the Detroit Zoological Institute, call (248) 398-0900.