A sitemap is an XML file that lists the URLs of a website to indicate to crawlers which pages exist and deserve to be crawled. For a nature-focused site, where the content includes species profiles, hiking trails, photo galleries, and seasonal articles, this file becomes a fully-fledged technical management tool.
XML Tags of the Sitemap: What Google Really Uses
The structure of a sitemap file relies on a few tags framed by the sitemaps.org protocol. Three of them appear in most guides: loc (the URL), lastmod (last modified date), priority, and changefreq.
Google ignores the priority and changefreq tags. These two fields, still frequently recommended in general articles, do not constitute an optimization axis. The only metadata used in addition to the URL remains lastmod, and only if the date corresponds to a real content modification. Indicating a fictitious update date to “force” a new crawl has no positive effect.
For a nature site, the lastmod tag makes perfect sense on pages updated according to the seasons: flowering calendar, birdwatching periods, access conditions to a trail. When a profile is actually updated (new data, correction of a protection status), the lastmod date should reflect this change. Articles published once and never touched can retain their original date without issue.
A concrete example of structuring can be found on the sitemap page of Exp Nature, which organizes its URLs by types of content related to wildlife, flora, and outdoor activities.
Sitemap and Indexing: A Help for Discovery, Not a Guarantee
A misunderstanding persists: submitting a sitemap to Google Search Console does not guarantee either the crawling or the indexing of the listed URLs. Google presents the sitemap as a means to more easily discover pages, not as an indexing order.
This distinction changes the way to evaluate the effectiveness of the file. Counting the number of “submitted” URLs in Search Console is not enough. The relevant indicator is the gap between the number of URLs present in the sitemap and the number of URLs actually indexed, visible in the “Pages” report of Search Console.
A significant gap between these two values can reveal several technical issues:
- Pages mistakenly marked as noindex, often due to a misconfigured SEO plugin or a staging environment whose directives have been retained in production.
- Canonicalization issues, when multiple URLs point to similar content and Google chooses a different version than that declared in the sitemap.
- Chain redirects or server errors (codes 3xx, 4xx, 5xx) that prevent the crawler from accessing the final page.
The status “Discovered, currently not indexed” in Search Console does not mean that the sitemap is misconfigured. It simply indicates that Google has spotted the URL but has not yet scheduled its crawl, sometimes for crawl budget reasons.
Structuring a Sitemap for a Nature Website
A nature site accumulates very different types of content: blog articles, descriptive sheets, image galleries, interactive maps, event pages. Grouping everything into a single XML file works for small sites but quickly becomes unreadable beyond a few hundred pages.
The Sitemap Index to Segment by Theme
The solution is to create a sitemap index file that references several secondary sitemaps. Each secondary sitemap corresponds to a type of content: one for species profiles, one for blog articles, one for photo galleries.
This segmentation allows for immediate identification of which type of content is causing indexing issues. If the “species profiles” sitemap shows a low indexing rate while the “articles” sitemap performs well, the diagnosis focuses on the structure of the profiles.
Excluding Unnecessary Pages from the Sitemap
An effective sitemap only lists pages intended to be indexed. Internal search results pages, automatically generated tag pages, date archives, or pagination pages generally do not belong in Google’s results.
On a nature site built with WordPress, SEO plugins allow for the exclusion of these URLs from the sitemap. The basic rule: if a page does not provide standalone value to a visitor arriving from a search engine, it does not belong in the file.
Submitting and Monitoring the Sitemap in Search Console
Submitting the sitemap is done through the “Sitemaps” section of Google Search Console. The URL of the file (often yoursite.com/sitemap.xml or yoursite.com/sitemap_index.xml) is declared only once. Google will then regularly check it without manual intervention.
Active monitoring counts more than the initial submission. Two regular checks are sufficient:
- Compare the number of submitted URLs to the number of indexed URLs each month to detect a gradual drift.
- Check that newly published pages appear in the sitemap, which is not always automatic depending on the configuration of the plugin used.
- Ensure that the lastmod date of modified pages updates correctly by inspecting the raw XML file in a browser.
A well-structured sitemap does not replace a coherent internal linking strategy. The two mechanisms complement each other: internal linking guides crawlers through the site’s navigation, while the sitemap provides them with a reference list. For a nature site rich in seasonal content and thematic profiles, this complementarity remains the most direct technical lever to improve indexing coverage.
