Collaborators have the following abilities in BugHerd:
Create new feedback tasks on a project via the sidebar on your site
View all tasks and comments in a project
Get notified by email on updates to those bugs they reported or have commented on
Add comments and attachments to any bugs on a project
Mark their tasks as closed or re-open them
Note: collaborators have full read-only access to the task board for a project and can view any tasks, comments  and people on that project.