▁eggs ▁of ▁one ▁species ▁in ▁the ▁n ests ▁of ▁others . ▁In ▁ 1 8 3 5 ▁he ▁wrote ▁that ▁he ▁had ▁experiment ally ▁found ▁ch aff in ches ▁to ▁remove ▁a ▁foreign ▁egg ▁when ▁placed ▁in ▁their ▁cl utch . ▁He ▁also ▁suggested ▁the ▁idea ▁of ▁replacing ▁the ▁original ▁cl utch ▁with ▁another ▁cl utch ▁but ▁with ▁a ▁single ▁foreign ▁egg ▁and ▁suggested ▁based ▁on ▁his ▁own ▁results ▁that ▁either ▁the ▁foreign ▁eggs ▁would ▁be ▁disc arded ▁or ▁that ▁the ▁birds ▁would ▁abandon ▁the ▁nest . ▁B ly th ▁also ▁exam ined ▁the ▁patterns ▁of ▁mou lt ▁in ▁various ▁bird ▁groups . ▁ ▁B ly th ▁edited ▁the ▁section ▁on ▁" M amm alia , ▁Bird s , ▁and ▁Re pt iles " ▁in ▁the ▁English ▁edition ▁of ▁C uv ier ' s ▁Animal ▁Kingdom ▁published ▁in ▁ 1 8 4 0 , ▁inserting ▁many ▁observations , ▁corre ctions , ▁and ▁references ▁of ▁his ▁own . ▁His ▁Catalogue ▁of ▁the ▁m amm als ▁and ▁birds ▁of ▁Bur ma ▁was ▁published ▁post hum ously ▁in ▁ 1 8 7 5 . ▁ ▁Working ▁in ▁the ▁scientific ▁field ▁of ▁her pet ology , ▁from ▁ 1 8 5 3 ▁through ▁ 1 8 6 3 , ▁he ▁described ▁over ▁three ▁dozen ▁new ▁species ▁of ▁re pt iles ▁and ▁several ▁new ▁species ▁of ▁am ph ib ians . ▁ ▁References ▁ ▁External ▁links ▁▁ ▁Archives ▁of ▁Charles ▁Dar win ▁and ▁his ▁correspond ence ▁with ▁B ly th ▁Catalogue ▁of ▁m amm al ▁and ▁birds ▁of