Cyathus striatus

Cyathus striatus, commonly known as the fluted bird's nest,[5][6] is a common saprobic bird's nest fungus. This fungus resembles a miniature bird's nest with numerous tiny "eggs"; the eggs, or peridioles, are actually lens-shaped bodies that contain spores. The color and size of this species can vary somewhat, but they are typically less than a centimeter wide and tall, and grey or brown in color. The common name splash cups alludes to the method of spore dispersal: the sides of the cup are angled such that falling drops of water can dislodge the peridioles and eject them from the cup.[7][8] C. striatus can be distinguished from most other bird's nest fungi by its hairy exterior and grooved (striated) inner walls. source

source	iNaturalist is a citizen science platform and online social network that allows users to record and share observations about biodiversity, as well as assist in species identification. The platform allows users to upload photos or videos of plants, animals, and other organisms, which can then be identified by a community of other users. In addition, iNaturalist also has an automatic identification feature that uses computer vision to help identify species.