Under what specific condition will Banded Woolly Bears consume grasses and grains?

Answer

Only when the plants are in their leafy, green stage

While the Banded Woolly Bear favors broadleaf options like dandelion and clover, they are known to turn to grasses and grains if those preferred sources are unavailable. However, this consumption is highly conditional. They will only eat grasses and grains when these plants are present in their leafy, green stage. Crucially, dried matter, such as harvested grain kernels, is generally not consumed by the caterpillar, indicating a requirement for fresh, leafy material even when consuming less preferred food sources like grasses.

Under what specific condition will Banded Woolly Bears consume grasses and grains?
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