Furthermore , they have been found on shed feathers and hair , bran , semolina and flour ( possibly preferring wheat flour ) , biscuits , casein , and insect specimens in museums .
They will eat synthetic fibers if they are blended with wool .
They have been found on shed feathers and hair , bran , semolina and flour ( possibly preferring wheat flour ) , biscuits , casein , and insect specimens in museums .
They will eat synthetic fibers if they are blended with wool .