As we gear up to celebrate dads of all shapes and sizes, here’s a look at some of the top fathers at Lincoln Park Zoo.

White-cheeked gibbon Caruso has helped raise three boys with mate Burma at Helen Brach Primate House, including their youngest, Sai, who currently shares the exhibit with them. While Burma carries the little ones for their first months of life, Caruso steps in to teach them the finer points of play once they become independent.

Bolivian gray titi monkey Ocala is more hands-on in rearing his offspring. Together with mate Delasol (our Mother’s Day top mom), he’s raised eight little monkeys at the Helen Brach Primate House. Ocala often begins carrying the new arrivals within a few days of them being born, giving mom a much-needed break.

Black-and-white colobus Zambezi can’t match Ocala’s tally, but he has fathered four striped offspring. The 19-year-old monkey can often be seen watching his family climbing around their exhibit at Regenstein African Journey.

Red wolf Tanner is head of the pack at the Pritzker Family Children’s Zoo, where he prowls the yard with his mate and two daughters born in 2010. But this alpha male is also a leader in conservation efforts to restore his endangered species to the wild. Six of the 21 pups he’s sired have been successfully transplanted to wild dens in North Carolina.

Our male crested wood partridge is helping to rear his second clutch of chicks this year! With three chicks that hatched in January caring for themselves at the McCormick Bird House, dad and mom are now managing a new brood of five little ones. Both parents gather grains, seeds and fruits for the new arrivals!

European white stork Jethro can typically be spotted near the mesh at Regenstein Birds of Prey Exhibit, bringing a regurgitated diet of rodents and insects to five rapidly growing chicks. With mate Cheyenne, Jethro also fathered a single offspring in 2011 and three chicks in 2010—the only stork chicks hatched in Lincoln Park Zoo’s long history. Read more about the European white stork family.