iNaturalist is an online community for nature lovers. Members of iNaturalist can use the community to record what they see in nature, meet other nature lovers, and learn about the natural world.
The iNaturalist Google Map lets users submit their observations and browse the reports of other nature lovers. The map uses categorised markers to indicate if a report is about a plant, bird or animal etc. Observations can include comments and photographs.
Each submitted report is given a dedicated page with details and photographs of the observation and with space for readers to leave comments (particularly useful if you need help in identifying something).