Their natural habitat is being destroyed by man, and other bird species such as European House Sparrows, European Starlings and Wrens compete aggressively for the same nest sights.
(Their natural habitat; is being destroyed; by man) (other bird species such as European House Sparrows, European Starlings and Wrens; compete aggressively; for the same nest sights)
Their natural habitat other bird species such as European House Sparrows, European Starlings and Wrens
is being destroyed compete aggressively
by man
for the same nest sights