Mud puddle

A puddle is a small accumulation of liquid, usually water, on a surface. It can form either by pooling in a depression on the surface, or by surface tension upon a flat surface.

A puddle is generally shallow enough to walk through, and too small to support a boat or raft. Young children enjoy splashing in puddles, often while wearing wellington boots. Small wildlife may be attracted to puddles.

Puddles in natural landscapes and habitats, when not resulting from precipitation, can indicate the presence of a seep or spring. Small seasonal riparian plants, grasses, and wildflowers can germinate with the ephemeral "head start" of moisture provided by a puddle.

Small wildlife, such as birds and insects, can use puddles as a source of essential moisture or for bathing. Raised constructed puddles, bird baths, are a part of domestic and wildlife gardens as a garden ornament and "micro-habitat" restoration. Swallows use the damp loam which gathers in puddles as a form of cement to help to build their nests. Many butterfly species and some other insects, but particularly male butterflies, need puddles for nutrients they can contain, such as salts and amino acids. In a behaviour known as puddling they seek out the damp mud that can be found around the edge of the puddles.

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Wikipedia