From 8b411375784a16e3ae59dda231ff9c5e69b03550 Mon Sep 17 00:00:00 2001
From: Marie-Helene Bourget <bourgetmarieh@gmail.com>
Date: Fri, 16 Jul 2021 10:07:54 -0400
Subject: [PATCH] Modify species as recommended and add examples

---
 src/03-modality-agnostic-files.md | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/src/03-modality-agnostic-files.md b/src/03-modality-agnostic-files.md
index 56887f88f3..6d5dd2de59 100644
--- a/src/03-modality-agnostic-files.md
+++ b/src/03-modality-agnostic-files.md
@@ -168,9 +168,11 @@ which MUST consist of `sub-<label>` values identifying one row for each particip
 followed by a list of optional columns describing participants.
 Each participant MUST be described by one and only one row.
 
-When different from `homo sapiens`, `participants.tsv` SHOULD include a `species`
-column, and the value MUST be the string of the binomial species name from
-[NCBI Taxonomy](https://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi).
+The RECOMMENDED `species` column SHOULD be a binomial species name from the
+[NCBI Taxonomy](https://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi)
+(for examples `homo sapiens`, `mus musculus`, `rattus norvegicus`).
+For backwards compatibility, if `species` is absent, the participant is assumed to be
+`homo sapiens`.
 
 Commonly used *optional* columns in `participants.tsv` files are `age`, `sex`,
 `handedness`, `strain`, `strain_rrid` and `diagnosis`. We RECOMMEND to make use