birds or butterflies?

[Michael Gochfeld]

It doesn't sound like cross-purposes really.  Tree Swallows probably won't eat
many butterflies, unless other insect populations are unusually low (i.e.
after pesticide applications)  M Gochfeld.


Don Benson wrote:

> A group of us are trying to enhance a 14 hectare site in Richmond, British
> Columbia. The birders are putting up bird boxes for tree swallows.  The
> butterfly people are trying to attract butterflies by planting larval
> foodplants and nectar plants. Eventually we hope to introduce anise
> swallowtails and purplish coppers to the site.
>
> Will the tree swallows eat the butterflies?  Are we working at cross
> purposes by putting up bird boxes in an area where we are trying to create
> habitat for butterflies?
>
> Don Benson
>
>
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