This particular organism has a complex life cycle in which a fish is the intermediate host (larval stage) and a fish-eating bird is the primary host (adult stage).
(This particular organism; has; a complex life cycle in which a fish is the intermediate host (larval stage) and a fish-eating bird) (a fish; is; the intermediate host (larval stage) and a fish-eating bird; L:a complex life cycle) (This particular organism has a complex life cycle; is; the primary host)
This particular organism a fish This particular organism has a complex life cycle
has is is
a complex life cycle in which a fish is the intermediate host (larval stage) and a fish-eating bird
the intermediate host (larval stage) and a fish-eating bird L:a complex life cycle
the primary host