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Nature House Products

Copper Portals

The Antimicrobial qualities of copper are well known.  Man has exploited the inherent antimicrobial properties of copper since the dawn of civilization.  It has been demonstrated clearly in many scientific studies conducted over several decades that copper has rapid, broad spectrum antimicrobial efficacy against some of the most toxic species of bacteria, fungi and viruses.

Alloys with higher copper content kill organisms faster but, as a general rule, alloys with >60% copper have good efficacy.  'Antimicrobial Copper' is shorthand for these efficacious alloys.

Erva's copper bird house portals are 99.9% pure copper and offer the highest possible antimicrobial effect.

Keep your birds healthy by providing the cleanest possible nesting compartments.  Wikipedia Copper Facts



PH4C - 1" Diameter Portal for Wren Houses - Genuine Copper

PH4C - 1" Diameter Portal for Wren Houses - Genuine Copper

You can use this metal plate to prevent squirrels from chewing and enlarging the opening on any nestbox with an existing 1" opening. Are you looking for a new, very...
$3.49
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PH3C- 1.125" Dia. Portal for Chickadee Houses - Genuine Copper

PH3C- 1.125" Dia. Portal for Chickadee Houses - Genuine Copper

You can use this metal plate to prevent squirrels from chewing and enlarging the opening on any nestbox with an existing 1-1/8" opening.
$3.49
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PH2C- 1.25" Diameter Portal for Nuthatch Houses - Genuine Copper

PH2C- 1.25" Diameter Portal for Nuthatch Houses - Genuine Copper

You can use this metal plate to prevent squirrels from chewing and enlarging the opening on any nestbox with an existing 1-1/4" opening.
$3.49
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PH1C- 1.5" Portal for Bluebird Houses - Genuine Copper - USA

PH1C- 1.5" Portal for Bluebird Houses - Genuine Copper - USA

Use this .021 thick genuine copper plate to prevent squirrels, mice and woodpeckers from chewing/drilling and enlarging the opening on any nestbox with an existing...
$3.49
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PH5C - 1.563" Dia. Portal for Western Bluebirds - Genuine Copper

PH5C - 1.563" Dia. Portal for Western Bluebirds - Genuine Copper

You can use this metal plate to prevent squirrels, mice and woodpeckers from chewing/drilling and enlarging the opening on any nestbox with an existing 1-9/16"...
$3.49
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