No, it is a reptile.
Plumed basilisk was created in 1876.
I am going to assume you meant the plumed basilisk which lives from 7 to 10 years in captivity.
usually mudbloods and halfbloods as well as the odd squib
fast enough to run on water without sinking.
While the basilisk is a fictitious creature, it is not a mammal, it would be a reptilian creature, since it is a snake.
The population of plumed basilisks across their range in Central and South America is not well studied, so an exact worldwide population number is not available. However, they are listed as a species of Least Concern by the IUCN Red List, which suggests that their population is relatively stable and not currently at risk of extinction.
De-plumed was created in 2010.
The Plumed Serpent was created in 1926.
Yellow-plumed Honeyeater was created in 1838.
White-plumed Honeyeater was created in 1837.
Golden-plumed Parakeet was created in 1894.
Basilisk is the common name. Basiliscus is the first part of the latin name for 4 species. A common name for the basiliscus vittatus is the "jesus lizard" and its also called the striped or brown basilisk. Then there are the plumed, the western or red-headed and the common basilisks.