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open hivetop incubator

a wide, shallow box is shown with the top panel removed. the inside is lined with a light gray foam material, and in the box is a loose pile of bluish-gray balls, which are actually cocooned adult Osmia lignaria bees near ready to emerge.

An open hivetop incubator reveals approximately 2,000 cocooned adult Osmia lignaria bees. The incubator draws excess heat from an active honey bee hive below and warms the O. lignaria bees for pollinating early-blooming fruit trees like cherries, apples, and almonds.

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