I abolutely love these @demotlj! Thanks for starting this thread! I have to say I typically create bird characters from looking at my field guide books, which feels a bit like cheating compared to your lovely drawings which are clearly from life.
Here are some of my nature studies
All of these were done at very different times in my illustration journey over the past 3 years and I'm not sure it's all really considered "nature journaling" (unless you call brussel sprouts & bananas bought from the store nature )
Can't wait to see what others post here!