Hi Phil,
Are all these bird boxes/cameras in one area? If yes, you connect the cameras to encoders and the encoders connects to a switch via 10/100/1000 copper. The switch could be a 3560 or a 3750 with 48 ports 10/100/1000 copper and depending on the model 2 fiber 1Gig or 10Gig uplinks.
You would need to run Multicast to stream the data from the cameras to a web server.
HTH
Reza