Now that nesting season is in full swing, resident raptors assert control over their territory. Here a Riverside parents escorts last years juvenile out of the area.
![Peregrine vs Peregrine](https://lh3.googleusercontent.com/blogger_img_proxy/AEn0k_v2QmS8DuoIZmalX8qUkGSwVHIdVb1dZn4pvah33t_R30B2w9gEqsexs1wl1xGN2kJD4OIaJ-SwGFvO0Veg7mAECjdd7pwVH0-3FykpkwhpKvH98KTmIXzMxABnjueNK5qa=s0-d)
The adult was making its "e-chuck, e-chuck!" And drove the youngster out.
![Peregrine vs Peregrine](https://lh3.googleusercontent.com/blogger_img_proxy/AEn0k_ucIqSZMZOjEcWiIaPcZtByRpBrzAH25toqe8obbnmRT4qaOM3KoZ0GkWz-fxABJTfUZlC9BtHrSBlMRnyTe4-LJMOs_uxyLzeilCe1kO-xiTjMWNvh--t7CS6515HmLeOQ=s0-d)
They will also attempt to kill any Cooper's Hawk now found, as Cooper's will prey on young Peregrines if given a chance. This sub-adult was still lurking amongst the rooftops, trying to keep a low profile.
![CoopersHawk](https://lh3.googleusercontent.com/blogger_img_proxy/AEn0k_vbo5_x1mpvA4AXu4nIlMd0hm1kpYSNiGTGtF4c4-QXIyYKQYdYDXsCZ9eAGp2h-n1iNwV0Yj620NHJwiPW1RY5E6lRzbETSltzigfac9KOBmdVu8RwuTU1RCMBZOYMcLOk=s0-d)
It lit out, trying to flush birds from their perches and almost got this Starling.
![CoopersHawk vs Starling](https://lh3.googleusercontent.com/blogger_img_proxy/AEn0k_sV3MFdO0EFKWwJPTuLgcy5ECCGjBchmXf6jQl4efCUKbnZR2skw4jzhbf7_t8CmNi5E9wleXy-Ene4mkjFkJDKlJCEcWx8OQ9SpKBEMjgbZ7xlqGWkkUDrwucihdIiecTl=s0-d)
In level flight, an aware starling is very tough to catch...as the Cooper's swung around after missing, an unseen Kestrel gave him a swat for his effort.
![CoopersHawk vs Starling vs Kestrel](https://lh3.googleusercontent.com/blogger_img_proxy/AEn0k_u9JSjqJ2BsOqs2qUV-8-bhdH0B0CNNKF8gjSM3Vet3-X1ljkqMtajtOdN3UW0MVwmZtzONOBEet9RsnNndI2BJMTFjmGEdOZazaQWJyPuTInadWoied_OBwmIHW-Oi1U0=s0-d)
Kestrel passing by Riverside Church.