"That bi*ch Carole Baskin killed her husband," Hyland captioned Saturday's images showing her and Adams wearing animal print clothes.
Hyland also has a handlebar mustache drawn on her face and Adams is wearing a long, blonde wig.
The sitcom Modern Family wrapped up its season run on ABC this week.
Tiger King, the Netflix docu-series that has captivated the attention of many social-distancing viewers, is getting an after-show Sunday.
The reality series follows Exotic, a private zoo owner who keeps hundreds of tigers, and his rivalry with animal activist Baskin.
The popularity of the show has led to a Florida sheriff re-opening a cold case surrounding the disappearance of Jack "Don" Lewis, Baskin's former husband.
Lewis ran a wildlife sanctuary in Tampa with Baskin before his disappearance in 1997.
Exotic is now serving a prison sentence for his role in a plot to kill Baskin.