I have seen a few hummingbirds in California and Arizona. One common bird was the Anna’s Hummingbird near a stream within a woodland area in California.
The wings of a robin are more slender and pointed , the owls have rounded powerful wings and the feathers up close on the owl are soft not like the robins stiff feathers. Owls are powerful hunters. The food selection of robins is different then some owls, they eat small insects. Robins build their nests but owls are cavity nesters often using a banded nests.
I did not know that the size of talons helped clue you in in what owls eat, however I did know that their range and habitat were clues and in other birds the beaks were also indicators. The wallabies as prey to powerful owls would be the one suprise