Osprey, bald eagle, and great blue heron have numerous nesting sites which are often easily viewable.
(Osprey, bald eagle, and great blue heron; have; numerous nesting sites which are often easily viewable) (numerous nesting sites; are; T:often; easily viewable)
Osprey, bald eagle, and great blue heron numerous nesting sites
have are
numerous nesting sites which are often easily viewable
T:often easily viewable