( Ticks ( ( are ( bloodsucking ( ( external parasites ) ( that ( feed ( on ( ( ( ( ( ( ( ( humans , ) ( wild ( and ( domestic mammals ) ) ) ) , ) birds ) , ) reptiles ) and ) others ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNS Ticks)) (VP (VBP are) (VP (VBG bloodsucking) (NP (NP (JJ external) (NNS parasites)) (SBAR (WHNP (WDT that)) (S (VP (VBP feed) (PP (IN on) (NP (NP (NNS humans)) (, ,) (NP (JJ wild) (CC and) (JJ domestic) (NNS mammals)) (, ,) (NP (NNS birds)) (, ,) (NP (NNS reptiles)) (CC and) (NP (NNS others)))))))))) (. .)))
Ticks are bloodsucking external parasites that feed on humans, wild and domestic mammals, birds, reptiles and others.
(ROOT (S (NP (VBG Bloodsucking) (NNS parasites)) (VP (VBP are) (NP (NP (QP (RB nearly) (DT all)) (NNS ticks)) (SBAR (WHNP (WDT that)) (S (VP (VBP live) (PP (IN on) (NP (NP (DT the) (NN body) (NNS surfaces)) (PP (IN of) (NP (NNS reptiles) (CC or) (NNS mammals)))))))))) (. .)))