A brown spider with a yellow stripe on its head is a wolf spider. The wolf spider may sometimes have an orange stripe on their head also.
The distinguishing feature of a black caterpillar with a yellow stripe is the presence of a bright yellow stripe running along its body.
The spider you are describing sounds like a Marbled Orbweaver spider, also known as Araneus marmoreus. This spider is known for its bright yellow body with red spikes or projections on its abdomen. It is commonly found in North America.
yellow eyed penguin
Argiope aurantia is a black spider with yellow stripes. Its common names join such different physical descriptions as black and yellow garden spider, corn spider, writing spider, and zipper spider. The black and yellow garden spider generally may be considered harmless to humans.
A snake.
The spider you are describing is likely a species of the orb-weaving spider called the Marbled Orbweaver (Araneus marmoreus). This species has a distinct bright neon yellow body with red or orange stripes on its abdomen, making it easily recognizable.
The distinguishing feature of a brown caterpillar with a yellow stripe is the presence of the yellow stripe running along its body.
The distinguishing feature of a black with yellow stripe caterpillar is its black body with a yellow stripe running along its length.
The national flag of Cameroon is a horizontal green stripe on the left, followed by a red stripe and then a yellow stripe. In the center of the red stripe is a yellow star.
mareting
This is called a "Buckskin". They will have black legs too.