I have definitely seen ticks on the underside of tree leaves in Ohio when we lived there. Ticks feel the heat coming off our heads, or is it the CO2 we exhale (I can’t remember if it’s one or the other or both) so the advantage of height increases their chance of finding a human blood source. To get on larger dogs of course they could possibly come from bushes that a dog would pee against. Since I have long hair, I always wear a wide brimmed hat when hiking outdoors, while keeping my hair tied up underneath the hat. Going out for a full day means a cotton skirt with long sleeves, and pants legs tucked inside boots or socks. I also use DEET very sparingly on my face, neck, and hands.
Here in North Carolina we have mosquitoes all day long! Those nasty Asian Tiger Mosquitoes are around during the day and love the English ivy in my neighbors yard. The very tiny mosquitos that bit me in Oklahoma would fit through window screens! There was no avoiding those! Thank goodness I was only visiting! As a child, a tick was found in my ear and I did not like that at all! A babysitter had to remove it as I’m sure she didn’t want it crawling into my eardrum. Neither did I! The 3 dog ticks I found alive in our upstairs bedroom quickly went into alcohol for my collection! 
“I love bugs! Anything creepy or crawly or fuzzy; Anything wacky or slimy or buzzy! Yes, I love, I love, oh I love bugs! (applause sign blinks! 
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Now back to your regular scheduled broadcasting…