Just got to read about it in the news. Apparently Seagulls usually stealing junkfood, fries and whats more, got a hold of some sort of designer drugs, made up from artificial cannabis molecules, and prove to be addicted to the stuff by scavenging aggresively for more.
Source: nypost.com/2023/05/22/swooping-seagulls-steal-drugs-get-stoned-turns-them-into-psycho-gulls/
Occurrences like this were destined to happen but surely must have happened before with other species many times over. Considering everything substance related this is probably just the tip of the iceberg.