Birds often specialize in a particular niche, such as a particular stratum of forest or type of vegetation.

Members of a particular stratum have a common identity, like interests and a similar life style.

They will therefore tend to identify with their particular stratum and regard themselves, for example, as middle or working class.

In fact, as they marched by a projection of that particular stratum, they faded from sight.

Samarra was a city of sections, each designated for a particular social strata or subgroup.

In society as a whole, and in any of its particular strata and groupings, some people are more gifted than others.

The fundamental change is that illegitimacy, irresponsibility and immorality are becoming quite acceptable - not in one particular social stratum, but to you as well.

It is usually used for relatively flat-lying deposits, such as those that follow a particular stratum.

Because each species has a tendency to stay in a particular strata in the tall forest, they seldom compete for the same food.

A particular social stratum may be politically dominant, even in relation to decisions concerning the means of production, without acting in their own class interests.