( ( Populations ( of ( many ( once-common ( land birds ) ) ) ) ) ( ( ( declined ( in ( ( ( ( ( ( the 1980s ) , ) ( ( most ( severely ( among ( neotropical migrants ) ) ) ) ( ( the ( ( more ( than 200 ) ) species ) ) ( of birds ) ) ) ) ( ( that nest ) ( in ( the ( United States ) ) ) ) ) and ) ( ( Canada and ) winter ) ) ) ) ( in ( ( ( ( ( Mexico , ) ( the Caribbean ) ) , ) and ) ( Central ( and ( South America ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (NNS Populations)) (PP (IN of) (NP (JJ many) (JJ once-common) (NN land) (NNS birds)))) (VP (VBD declined) (PP (IN in) (NP (NP (NP (DT the) (NNS 1980s)) (, ,) (RRC (ADVP (RBS most) (RB severely) (PP (IN among) (NP (JJ neotropical) (NNS migrants)))) (NP (NP (DT the) (QP (JJR more) (IN than) (CD 200)) (NNS species)) (PP (IN of) (NP (NNS birds)))))) (NP (NP (DT that) (NN nest)) (PP (IN in) (NP (DT the) (NNP United) (NNPS States)))) (CC and) (NP (NP (NNP Canada)) (CC and) (NP (NN winter))))) (PP (IN in) (NP (NP (NNP Mexico)) (, ,) (NP (DT the) (NNP Caribbean)) (, ,) (CC and) (NP (NNP Central) (CC and) (NNP South) (NNP America))))) (. .)))
Populations of many once-common land birds declined in the 1980s, most severely among neotropical migrants the more than 200 species of birds that nest in the United States and Canada and winter in Mexico, the Caribbean, and Central and South America.
(ROOT (S (NP (NP (JJ Many) (NNS species)) (PP (IN of) (NP (NP (NNS birds)) (PP (IN in) (NP (JJ new) (NN england)))))) (VP (VBP fly) (ADVP (RB south) (PP (IN for) (NP (DT the) (NN winter) (NNS months)))) (S (VP (TO to) (VP (VB find) (NP (DT an) (NN environment)) (PP (IN with) (NP (JJR more) (NN food))))))) (. .)))