Does the zoo have free admission on Thursdays in April

No not that im aware of

No. The Zoo does not offer free admission on Thursdays in April. Zoo Admission March 16, 2018 - October 31, 2018 Members                                             Free Adults (ages 12+)                                $24.95 Children (ages 2-11)                            $19.95 Children (under 2)                               Free  Pre-paid parking (per vehicle)             $16

I'm gonna venture a guess and say - no...

Not that I'm aware of.

Not to my knowledge.