Tannin inside a black walnut, which are in season and it's time to race against squirrels and others, to nab these natively-grown nuts Mon., Oct. 4, 2021.

Tannin inside a black walnut, which are in season and it's time to race against squirrels and others, to nab these natively-grown nuts Mon., Oct. 4, 2021. (Karl Merton Ferron/The Baltimore Sun)

Harvesting black walnuts

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Black walnuts are in season and it's time to race against squirrels and other nut lovers, to nab these natively-grown yet mysterious fruits..

Black walnut harvesting in Maryland

Tannin inside a black walnut, which are in season and it's time to race against squirrels and others, to nab these natively-grown nuts Mon., Oct. 4, 2021.

Tannin inside a black walnut, which are in season and it's time to race against squirrels and others, to nab these natively-grown nuts Mon., Oct. 4, 2021. (Karl Merton Ferron/The Baltimore Sun)

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Black walnut harvesting in Maryland

Black walnuts are in season and it's time to race against squirrels and others, to nab these natively-grown nuts Mon., Oct. 4, 2021.

Black walnuts are in season and it's time to race against squirrels and others, to nab these natively-grown nuts Mon., Oct. 4, 2021. (Karl Merton Ferron/The Baltimore Sun)

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Black walnut harvesting in Maryland

Black walnuts - seen here in gathering bags which should not be used for storing - are in season and it's time to race against squirrels and others, to nab these natively-grown nuts Mon., Oct. 4, 2021.

Black walnuts - seen here in gathering bags which should not be used for storing - are in season and it's time to race against squirrels and others, to nab these natively-grown nuts Mon., Oct. 4, 2021. (Karl Merton Ferron/The Baltimore Sun)

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Black walnut harvesting in Maryland

Black walnuts are in season and it's time to race against squirrels and others, to nab these natively-grown nuts Mon., Oct. 4, 2021.

Black walnuts are in season and it's time to race against squirrels and others, to nab these natively-grown nuts Mon., Oct. 4, 2021. (Karl Merton Ferron/The Baltimore Sun)

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Black walnut harvesting in Maryland

After harvesting black walnuts, place enough of them in a paper bag that allows them room to let moisture escape as the sit in a cool, dark and dry environment Wed., Oct. 6, 2021.

After harvesting black walnuts, place enough of them in a paper bag that allows them room to let moisture escape as the sit in a cool, dark and dry environment Wed., Oct. 6, 2021. (Karl Merton Ferron/The Baltimore Sun)

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Black walnut harvesting in Maryland

Husk flies can place eggs inside the husk - they tend to resemble housefly worms but these do not penetrate the hard shell or meat inside Wed., Oct. 6, 2021.

Husk flies can place eggs inside the husk - they tend to resemble housefly worms but these do not penetrate the hard shell or meat inside Wed., Oct. 6, 2021. (Karl Merton Ferron/The Baltimore Sun)

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