For this reason, areas of dense texture must be watched very closely.
Other areas of dense population occur in certain lowland and foothill regions.
They live in areas of dense bush, but the males perch in the open to sing their musical territorial songs.
Some archeologists have employed other remote-sensing methods to survey sites, but in areas of dense forest those technologies yield Rorschach-like images that even experts cannot decipher.
Salford's rapid population growth in the 19th century brought into being large areas of dense, poor-quality housing, which remained a problem in the 20th century.
It is difficult to see how hunting and gathering bands could successfully invade areas of dense civilized populations; but agricultural groups, during periods of dynastic weakness, undoubtedly could.
The weathered volcanic lavas produce a fertile soil, however, and the highlands of the volcanic zones have consequently become highly productive agricultural zones and areas of dense population.
Away from the major cities and areas of dense population, there are significant variations from one valley to the next and almost from one village to the next.
Areas of dense activity give way here and there to more open sections, and the flow is interrupted by vertical or diagonal elements, but the sense of movement is constant and enveloping, and orchestrated with bravura authority.
As a result, the map of the entire genome resembles a population map of the United States, with urban areas of dense habitation, and vast rural tracts occupied by three people and their sport utility vehicles.
This has occurred in the grass-dominated, seasonally flooded areas of northernmost Australia to which the giant sensitive plant (Mimosa pigra) was introduced from Mexico; it since has multiplied to form extensive areas of dense, unnatural scrubland.
