"coverts" in the noun sense
a flock of coots
2. screen, cover, covert, concealment
a covering that serves to conceal or shelter something
"a screen of trees afforded privacy"
"under cover of darkness"
"the brush provided a covert for game"
"the simplest concealment is to match perfectly the color of the background"
Source: WordNet® (An amazing lexical database of English)
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