It might be helpful if you added some geolocation info to the maps. Even if you just labeled lake Oroville and lake Folsom, that would help set a western boundary for Tahoe National Forest.
The other ongoing aspect of this story is last year's DROUGHT and this year's HEATWAVE. Sacramento isn't doing too bad today. Strangely, it's a relative scorcher in C-U IL : : Temperature almost at 100F today and may get there tomorrow.
An ultimate integral goal is to correlate macro and micro data sets about vegetation and climate change. If an ecosystem goes through years of drought, does that also correlate to smaller, weaker insects found living in situ?