Their natural habitat is being destroyed by man, and other bird species such as wrens, sparrows and starlings compete aggressively for their nest sites.
(Their natural habitat; is being destroyed; by man) (other bird species such as wrens, sparrows and starlings; compete aggressively; for their nest sites)
Their natural habitat other bird species such as wrens, sparrows and starlings
is being destroyed compete aggressively
by man
for their nest sites