Gallinaceousbirdsofmanygeneralikewiseshowaneminentcapacityforbreedingundercaptivity。Thisisparticularlythecasewithpheasants，yetourEnglishspeciesseldomlaysmorethanteneggsinconfinement;whilstfromeighteentotwentyistheusualnumberinthewildstate。（18/48。Mowbrayon’Poultry’7theditionpage133。）WiththeGallinaceae，aswithallotherorders，therearemarkedandinexplicableexceptionsinregardtothefertilityofcertainspeciesandgeneraunderconfinement。Althoughmanytrialshavebeenmadewiththecommonpartridge，ithasrarelybred，evenwhenrearedinlargeaviaries;andthehenwillneverhatchherowneggs。（18/49。
Temminck’Hist。Nat。Gen。desPigeons’etc。1813tome3pages288，382;
’AnnalsandMag。ofNat。Hist。’volume121843page453。Otherspeciesofpartridgehaveoccasionallybred;asthered—legged（P。rubra），whenkeptinalargecourtinFrance（seeJournaldePhysique’tome25page294），andintheZoologicalGardensin1856。）TheAmericantribeofGuansorCracidaearetamedwithremarkableease，butareveryshybreedersinthiscountry（18/50。Rev。
E。S。Dixon’TheDovecote’1851pages243—252。）;butwithcarevariousspecieswereformerlymadetobreedratherfreelyinHolland。（18/51。Temminck’Hist。
Nat。Gen。desPigeons’etc。tome2pages456，458;tome3pages2，13，47。）