We were able to document a number of interesting patterns from our videos.  

1) Not surprisingly, the non-urban predator community is more diverse than the urban predator community.  

2) Urban predation events were clearly dominated by house cats.  Some of these cats had collars and we can therefore conclude that they are people's pets.  Did you know that your cat is eating eggs and nestling birds?  All but one of our cat predation events occurred at night.  Please, at the very least, keep your cats indoors at night.  While mockingbird populations are successful despite these levels of cat predation, there are numerous other species (e.g., towhees) that are struggling to survive in urban areas.

3) Non-urban predation events are dominated by snakes and Cooper's Hawks.  While we never recorded Cooper's Hawks taking urban nests, we have documented them at every one of our urban study sites...so, what's up with the urban hawks?  Cooper's Hawks are adult bird predators and we think that in town they are eating large urban doves that in non-urban areas are either rare (Eurasian Collared Doves) or not concentrated around bird feeders (Mourning Doves).  Thus, the urban Cooper's Hawks appear to have undergone a dietary shift.

4) Despite the high abundance of crows and grackles in urban areas, they were not particularly common nest predators.  Perhaps they too have undergone a dietary shift and prefer french fries to mockingbird eggs and nestlings.