The parent is doing some housekeeping by removing a fecal sac form the nest.
Photo credit: Robert A. Hall
Thank you Graham Williams, Land Management Specialist at SJRWMD North Region, for the identification.
Presumably picking up eastern tent caterpillar tent for nest material.
The White-eyed Vireo (Vireo griseus) is a small songbird. It breeds in the southeastern USA from New Jersey west to northern Missouri and south to Texas and Florida, and also in eastern Mexico, northern Central America, Cuba and the Bahamas.