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The growing human population and its associated economic activities have increased human-wildlife interactions. Herein, we provide new records of human-crocodile (HC) interactions in Mexico from 2018 through the first half of 2021. Fifty-one cases were recorded in this study; 2018 had the highest number of cases (n = 19), and 2021 (the first half) had the lowest number of cases. The states of Tamaulipas and Quintana Roo on the Gulf of Mexico represented 40% of the cases, while Oaxaca and Nayarit on the Mexican Pacific coast represented 22% of the cases. Male victims (n = 32) were more commonly associated with human-crocodile interactions than females (n = 10). Forty-four cases were non-fatal and only seven were fatal. As far as we know, our records of HC interactions increase the number of conflicts in Mexico to 250 cases.

We document the first verifiable records of Heloderma alvarezi (Bogert & del Campo, 1956) in southeastern Guerrero, Mexico. We recorded seven individuals of H. alvarezi near the village of Cihuapoloya, municipality of Cuautepec. These are the westernmost records of the species, extending its distribution by approximately 149 km from the nearest previously known occurrences in Oaxaca. With these records, the number of reptile species in Guerrero increases to 182.