I found this hawk(?) sitting on a fence near a small duck pond with a fountain near my workplace in Fort Smith, Arkansas, USA. There are some wooded hills (deciduous) nearby. It let me get within 3 meters or so before flying up to a tree across the pond. Based on measurements made of the fence it was sitting on, I'm guessing a height of 50 cm (20 inches) head to tail, I assume it'd have a wingspan of 60-70 cm perhaps (24-28 inches).
It looks very much like an immature red shouldered hawk.
Immature Red-shouldered Hawks can be tricky to identify. Immature Red-tails show a belly band and are less heavily marked on the upper chest than young Red-shouldered Hawks.
Red shouldered hawks are smaller and like deciduous forests, like perching on wires, branches, etc. Red tailed hawks are usually birds of open spaces. They hunt from lower down than red tails, and they're often found near water (especially rivers and swamps), as they like frogs and snakes.
Look for Red-shouldered Hawks in deciduous woodlands, often near rivers and swamps. They build stick nests in a main crotch of a large tree. During migration, Red-shouldered Hawks often move high overhead along ridges or along the coast.
Limited to a phone for a while and can't do much (I'm a dinosaur) but info and pictures here.