▁in ▁some ▁species ▁with ▁dark er ▁bar ring ▁or ▁white ▁or ▁yellow ish ▁spot ting ▁on ▁the ▁mant le . ▁The ▁under parts ▁vary ▁greatly ▁among ▁the ▁species , ▁r anging ▁from ▁all ▁rich ▁brown ▁in ▁the ▁ch est nut ▁pic u let , ▁to ▁wh it ish ▁in ▁the ▁plain - bre asted ▁pic u let , ▁white ▁with ▁dark ▁bars ▁in ▁the ▁white - bar red ▁pic u let , ▁and ▁pale ▁yellow ish ▁with ▁dark ▁bars ▁on ▁the ▁ch est ▁and ▁dark ▁sp ots ▁and ▁stre aks ▁ ▁on ▁the ▁bel ly ▁in ▁the ▁bar - bre asted ▁pic u let . ▁They ▁have ▁black ▁crow ns ▁with ▁red , ▁orange , ▁or ▁yellow ▁marks ▁in ▁the ▁male ▁and ▁white ▁d ots ▁in ▁the ▁female , ▁except ▁that ▁the ▁male ▁spe ck led ▁pic u let ▁has ▁brown ▁crown ▁marks ▁and ▁the ▁female ▁la cks ▁white ▁d ots . ▁Most ▁have ▁rather ▁short ▁black ▁t ails ▁with ▁white ▁stri pes ▁down ▁the ▁edges ▁and ▁the ▁center ▁( Bl ume ▁and ▁W ink ler ▁ 2 0 0 3 ). ▁In ▁two ▁species , ▁the ▁r uf ous - bre asted ▁and ▁the ▁ch est nut ▁pic u lets , ▁the ▁white ▁is ▁largely ▁replaced ▁by ▁r uf ous . ▁ ▁While ▁the ▁individual ▁species ▁often ▁are ▁habitat ▁special ists ▁( as ▁evident ▁by ▁a ▁number ▁of ▁highly ▁restricted ▁species ▁such ▁as ▁the ▁rust y - ne ck ed ▁and ▁och race ous ▁pic u lets ), ▁members ▁of ▁this ▁genus