It reopens to the public Friday at 10 am. Zoo members already had a chance to visit for a members-only opening last weekend.
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There are capacity limits and strict COVID-19 guidelines in place, so visitors will need tickets for specific entry times.
Reservations are free and can be done online or by phone at 312-742-2000. The zoo is open from 10 a.m. until 5 p.m.