Although it could simply be a dietary anomaly (what you eat), it is possibly internal bleeding from a specific spot in the large intestine, if it is consistent over time or recurring. Doctors are always on the look-out for 'blood in stools' problems for a few reasons. If it's consistent or recurring, one should definitely get it checked out soon.
The distinguishing feature of a brown spider with a dark brown stripe on its back is the presence of the stripe, which sets it apart from other brown spiders.
Yellow
A dorsal Stripe is a dark brown/black stripe that goes straight down the back of a horse. Duns have them, But usually not paint duns.
Dark brown
The distinguishing feature of a dark brown spider with a light brown stripe on its back is the presence of the stripe, which sets it apart from other spiders of similar coloration.
A light brown spider with a dark brown stripe has a distinctive marking that sets it apart from other spiders.
A dark brown spider with a tan stripe on its back may have a distinguishing feature that helps it stand out from other spiders.
Black stool is a condition where the feces are very dark and nearly black. Sometimes this is caused by supplements. Other times it is indicative of internal bleeding.
No. faeces only glows if you put phosphorus in the faeces
The food you ate.
A light brown spider with a dark brown stripe down the middle has a distinctive marking that sets it apart from other spiders.
Medication can alter the colour of stools