The bird you are referring to is called a Magpie.
The small bird with a yellow belly and black head is called a Yellow-bellied Flycatcher.
Red head and black body bird
The small white bird with a black head is called a Pied Wagtail.
The small bird with a white and black head is called a pied wagtail.
it has red spots on both sides of its head and it slides around on its belly.
The small brown bird with a white stripe on its head is called a White-crowned Sparrow.
That is the seed head.
they are black n white Typically, penguins do have a black head and back, but a white belly. Some kinds of Penguins also do have bright yellow parts in their face.
Homer is yellow and fat. He has a beer belly, and has a few strands of hair on his head. And he always wears a white shirt, and jeans.
It's not possible to be sure with so little information, but if it was on water it might be a great crested grebe.
The small bird with a black head and white body is called a pied wagtail.