( ( ( Red-cockaded ( family groups ) ) ( may ( include ( ( ( a ( breeding pair ) ) and ) ( ( as ( many ( as seven ) ) ) helpers ) ) ) ) ) ( , ( ( ( though ( more ( commonly they ) ) ) ( number ( ( ( ( three to ) seven ) birds ) total ) ) ) . ) ) )
(ROOT (SINV (S (NP (JJ Red-cockaded) (NN family) (NNS groups)) (VP (MD may) (VP (VB include) (NP (NP (DT a) (VBG breeding) (NN pair)) (CC and) (NP (QP (RB as) (JJ many) (IN as) (CD seven)) (NNS helpers)))))) (, ,) (VP (ADVP (RB though)) (ADVP (RBR more)) (VBZ commonly) (NP (PRP they))) (NP (NP (NN number)) (ADJP (NP (QP (CD three) (TO to) (CD seven)) (NNS birds)) (JJ total))) (. .)))
Red-cockaded family groups may include a breeding pair and as many as seven helpers, though more commonly they number three to seven birds total.
(ROOT (S (NP (NNP Birds)) (VP (VBP live) (CC and) (VBP breed) (PP (IN on) (NP (NP (CD seven)) (PP (IN of) (NP (DT the) (NN continents)))))) (. .)))
Birds live and breed on seven of the continents.