A RANGE OF THREATS
According to BirdLife International’s “State
of the World’s Birds” a range of threats drives declines
in bird populations. The threats to birds are many and varied: agriculture,
logging and invasive species are the most severe, respectively affecting
1,065 (87%), 668 (55%) and 625 (51%) globally threatened species, making
change of land use by far the greatest factor leading to species’
falling numbers. These threats create stresses on bird populations in
a range of ways, the commonest being habitat destruction and degradation,
which affect 1,146 (93%) threatened species.

Source: BirdLife International
“State
of the World’s Birds” (Ppages 4 and 8)
Declining bird numbers is not a new phenomenon, as
the “State of the World’s Birds” shows that in total
153 bird species are believed to have gone extinct since 1500. Avian
extinctions are continuing, with 18 species lost in the last quarter
of the twentieth century and three more known or suspected to have gone
extinct since 2000. The rate of extinctions on continents appears to
be increasing, principally as a result of extensive and expanding habitat
destruction.
[ Read
more about the State of the World’s Birds (SOWB) ]
[ Read
the SOWB Case Study: A range of threats drives declines in bird populations
]
World Migratory Bird Day
World Migratory Bird Day (WMBD) raises awareness about
the threats to migratory birds and the need for their protection. This
year’s WMBD theme “Migratory birds and people – together
through time” not only celebrates through events the cultural,
economic and environmental connections between migratory birds and people
but also aims to show the importance of migratory birds to human beings.
[ Read
more about this year’s WMBD theme ]
[ Read
more about how to make your own WMBD event ]
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