Because the dataset is pulled from Wikidata: (drop bear) https://www.wikidata.org/wiki/Q4819356

Hahah in a moment of desperation I put “unicorn” which its response made me laugh out loud.

The Australian Museum recognises them also: https://australian.museum/learn/animals/mammals/drop-bear/

Somewhat more impressively, it recognises bungarra .. although it stalls out and fails on other similar words for various local animals.

“Haggis” also gets a good response