 Although Triatominae bugs feed on them , birds appear to be immune to infection and therefore are not considered to be a T. cruzi reservoir . Even when colonies of insects are eradicated from a house and surrounding domestic animal shelters , they can re @-@ emerge from plants or animals that are part of the ancient , sylvatic ( referring to wild animals ) infection cycle . This is especially likely in zones with mixed open savannah , with clumps of trees interspersed by human habitation . 
 Although Triatominae <a href='uninflect' title='1'><mark>bugs</mark></a> feed on them , birds appear to be immune to infection and therefore are not considered to be a T. cruzi reservoir . Even when colonies of insects are eradicated from a house and surrounding domestic animal shelters , they can re @-@ emerge from plants or animals <a href='null_relcl' title='2'><mark>that</mark></a><a href='drop_aux' title='3'><mark>are</mark></a>part of the ancient , sylvatic ( referring to wild animals ) infection cycle . This <a href='drop_aux' title='4'><mark>is</mark></a>especially likely in zones with mixed open savannah , with clumps of trees interspersed by human habitation . 
Although Triatominae bug feed on em , birds appear to b immune to infection and therefore ain't considered to bba T. cruzi reservoir . Even when colonies of insects are eradicated from a house and surrounding domestic animal shelters , they can re @-@ emerge from plants or animals part of da ancient , sylvatic ( referring to wild animals ) infection cycle . This especially likely in zones wid mixed open savannah , with clumps of trees interspersed by human habitation .