1) Bird-watching 2) Observation of cardinals 3) Wildlife magazine 
The observation of wild birds in their natural habitats as a hobby or recreatioSee Birdwatching. 
[magazine] Birding is the bimonthly members` magazine of the American Birding Association. While not a formal journal, Birding offers enthusiasts in-depth and scholarly articles on field identification and bird conservation. Each issue also features tips on North American and foreign birdfinding, news in the world of birding, and reviews of...
• (n.) Birdcatching or fowling.
Bird'ing noun Birdcatching or fowling. Shak. Birding piece , 
The recreational pursuit of watching and recording wild birds. Almost synonymous with birdwatching this is the preferred term used by serious hobbyists who passionately enjoy studying birds. The English term “birder” originally referred to hunter of birds but this is no longer used as such. Birdwatching: Practically synonymous with birding. So...
Birding is British slang for chasing women.
the identification and observation of wild birds in their natural habitat as a recreation; bird-watching.