The Bird, also known as the Crow, is a miscellaneous character throughout many Valve titles and parent of Mr. Chubby Beak and other two unnamed chicks.
The Bird plays a minor role during the single player campaign, after Wheatley's takeover of Aperture Science, and returns later during the additional cooperative testing course, Art Therapy as the main antagonist.
Somewhere in Chapter 4
Wheatley makes an appearance behind the glass window of an Observation Room, only to be harassed by the Bird for doing something to her eggs as an attempt to put himself on the rail again.
Portal 2 Chapter 6 Reconciliation
After Wheatley assumes control of the facility, Chell and GLaDOS, now in potato form, become separated from each other. Chell soon discovers that the Bird had taken GLaDOS her to its nest. After Chell shoos the Bird away from GLaDOS, it flies away and remains unseen for the remainder of single-player story.
Cooperative Testing Initiative
In the Art Therapy testing course, Atlas and P-Body are sent to explore a section of the facility. Under the guise of an art exhibit millions of years into the future, GLaDOS activates the bots to explore an old section of the Enrichment Center. It is eventually made known that something in the defunct areas is overriding GLaDOS' attempts at restoring her full control over the complex. This leads them to a control room containing a prototype chasis for the central core. The robots stumble across the Bird's nest, now placed above the prototype central core's keyboard, and as GLaDOS observes it, she panics and yells at them to abort their mission. Startled, the Bird is forced to flee its home once again. P-body then closes the hatch that the Bird flew out from, making it impossible for it to return. GLaDOS then "adopts" the eggs, and ultimately chicks, having relocated them to the Central AI Chamber.
Half Life 2
Birds can be seen flying or gliding nearby beaches and forests, a similar crow sometimes appear inside City 17.
List of appearances