Yes I got the same results.
Google thought you meant activities for kids involving animals.
Animas do not usually become involved in activities.
You have to search for animal behaviour/behaviours.
It is not the noun phrase, it is explained in all dictionaries.
activity the state of a thing done, or in the process of being done.
the thing done by a single person or group of people.
The English language allows humans to be active to have activities and also behaviours.
But the English language in the dictionaries does not allow animals to have activities only behaviours.
Except in odd situations like this.
"The river bank has been severely eroded by the activities of moles digging tunnels and the water course has been badly clogged by the activities of beavers building dams" .
If you google search for 'animal name activities" you still get activities for kids.
"Elephant activities" "Beaver activities"
If you search google for "difference between activities and behaviour" you get many very advanced scholarly articles covering many disciplines.
In a nut shell humans and especially the English language, does not think animals are capable of performing an action or activity only a behaviour. The English Language applies high and mighty intelligence to doing an activity, but the activities of animals it regards as lowly instinctive baseline behaviour only.