A Suisse guy we met saw 4. Locals talk about 10 to 20 crocodilies in Guleta Archei.

That's a very important information.
Best of luck for the next tibesti travel. If possible, don't forget to take with you a nice photo of a crocodile and try asking around in people know them.

Many thanks!

I've just published a paper on the status of crocodiles in the Sahara and in particular in Mauritania.

The text can be seen here:
PLoS ONE: Crocodiles in the Sahara Desert: An Update of Distribution, Habitats and Population Status for Conservation Planning in Mauritania


The full paper can be downloaded from
http://www.plosone.org/article/fetch...esentation=PDF


For those really interest in knowing localitites to the detail should download the supplemenary material:

1) Detailed data on localities, crocodile observations, population status, and conservation issues affecting habitats in Mauritania: http://www.plosone.org/article/fetch...e.0014734.s001

2) Distribution, status and date of last observation of Nile crocodile populations in the Sahara excluding extant localities for Mauritania: http://www.plosone.org/article/fetch...e.0014734.s002

3) Distribution, status and date of last observation of Nile crocodile populations in Mauritania: http://www.plosone.org/article/fetch...e.0014734.s003


Hope you like to read it!

Cheers,
José