# Nomad · City Nature Challenge: sources Row #38 of `experiences_v1.csv` (research pass 3 Oct 2026, IST). Dates and deadlines come from `cal.py` (date check 4 Oct 2026, IST), which is the source of truth for dates, with the 4 Oct 2026 source-rule audit applied. The page deliberately shows **no prices** and no contact emails; see the official site. | Fact used | Source | |---|---| | Name, place (Participating cities worldwide (list posted early 2027), Multiple), continent | https://www.citynaturechallenge.org/participate (primary) · https://www.citynaturechallenge.org/ (secondary) | | Usual timing: April-May | https://www.citynaturechallenge.org/participate (primary) · https://www.citynaturechallenge.org/ (secondary) | | What you build / use: TAKE PART in a four-day wildlife photo challenge: photograph wild plants and animals in your city and upload them | https://www.citynaturechallenge.org/participate (primary) · https://www.citynaturechallenge.org/ (secondary) | | How a traveller takes part: Find your city on the participating list when it is posted (early 2027), then add your own observations on the app your city uses | https://www.citynaturechallenge.org/participate (primary) · https://www.citynaturechallenge.org/ (secondary) | | Participation level: Team entry (join a challenge) | https://www.citynaturechallenge.org/participate (primary) · https://www.citynaturechallenge.org/ (secondary) | | Entry requirements / deadline: Free and open to anyone; each city is led by local organisers; the participating-city list is not posted yet | https://www.citynaturechallenge.org/participate (primary) · https://www.citynaturechallenge.org/ (secondary) | | Verification note (research pass): Dates from the organisers' 2027 pages (California Academy of Sciences and Natural History Museum of Los Angeles County) (checked 26 Oct 2026). | experiences_v1.csv | | Date: 30 Apr–3 May 2027: City Nature Challenge 2027: observation days. Organisers: 30 Apr-3 May 2027. Build/use: Photograph wild plants and animals in your city. How to join: Join your city's challenge once the city list is posted (early 2027). | https://www.citynaturechallenge.org/ | | Date: 4–16 May 2027: City Nature Challenge 2027: identification days. Organisers: 4-16 May 2027. Build/use: Upload observations and help identify them. How to join: Share observations on your city's platform. | https://www.citynaturechallenge.org/ | | Date: 20 May 2027: City Nature Challenge 2027: results announced. Organisers: results announcement 20 May 2027. Build/use: See which cities found the most. How to join: Results are public. | https://www.citynaturechallenge.org/ | | Take-part route "Take part in your city's challenge" (Team entry): Photograph or record wild plants, animals and fungi in your city during the four observation days, then upload them to the platform your city uses and help identify what was found. | Re-worded from the CSV row and the dated items above | | Check note: 2027: observe 30 Apr-3 May, identify 4-16 May, results announced 20 May. | CSV verification notes / dated items above | | Check note: The list of participating cities is posted in early 2027; the organisers also have a page on organising a city for 2027. | CSV verification notes / dated items above | | Check note: Only wild life counts: mark planted or cared-for plants as cultivated. | CSV verification notes / dated items above | ## Skills you'll need (section 03) | Fact used | Source | |---|---| | Skills (this experience): Photographing or recording wild plants, animals and fungi; Noting where and when you saw something; Helping to identify other people's observations | Skills research, checked 2026-10-26 (IST) | | Difficulty (our estimate): Beginner; prep time (our estimate): 1 practice session. Difficulty and prep time are Curiosta editorial estimates for a first-timer, not organiser figures. | Curiosta editorial estimate | | Refresher, practice and safety steps: Anything wild counts: a plant, animal, fungus, slime mould or other evidence of life in your city. / Wild means it was not put there and is not cared for by people; mark planted or tended things as captive/cultivated. / Take a picture or record a sound, and note the location. / Share your observations on iNaturalist or your city's chosen platform. / A list of participating cities and a link to the global project will be posted in early 2027. / Photograph a few wild plants or insects near home and practise noting the location. / Read the participate page so you know the rules before the weekend. / Check whether your city has joined once the list is posted. / Do not disturb wildlife for a photo. / Respect private property and park rules. / Do not pick plants or move animals. | Our summary of the resources below | | Resource (Official; publisher: City Nature Challenge organisers (California Academy of Sciences and Natural History Museum of Los Angeles County)): City Nature Challenge: About the challenge and the 2027 timeline. | https://www.citynaturechallenge.org/ | | Resource (Official; publisher: City Nature Challenge organisers (California Academy of Sciences and Natural History Museum of Los Angeles County)): Participate: How to take part, what counts, and how the list of cities is posted. | https://www.citynaturechallenge.org/participate | | Resource (Official; publisher: City Nature Challenge organisers (California Academy of Sciences and Natural History Museum of Los Angeles County)): City organizers: How cities join, for people who want to organise one. | https://www.citynaturechallenge.org/organizers | ## Check notes shown on the page - 2027: observe 30 Apr-3 May, identify 4-16 May, results announced 20 May. - The list of participating cities is posted in early 2027; the organisers also have a page on organising a city for 2027. - Only wild life counts: mark planted or cared-for plants as cultivated. ## Our grouping - Levels shown: Team entry (our grouping of the CSV participation level "Team entry (join a challenge)"). - Usual months used by the month filter: Apr, May.