May 25, 2019 addition: In doing additional research on this subject, it's become clear that this study below is blatantly exaggerated, even more than I first suspected. I've included a link/info at the bottom of this thread that clarifies why the bee population collapse is not really happening. The number of bees is actually higher.
I was wrong in assuming that the bee population had continued to decrease!

Previous: Sadly, this appears to be at least partly true, even if exaggerated  but its not because of the best weather/climate for life on this planet in the last 1,000 years. There is no climate crisis. The warming has been more beneficial to insects not detrimental, they even state that:

https://phys.org/news/2019-02-world-catastrophic-collapse-insects.html

"By a large margin, habitat change—deforestation, urbanization, conversion to farmland—emerged as the biggest cause of insect decline and extinction threat.

Next was pollution and the widespread use of pesticides in commercial agriculture"

Experts estimate that flying insects across Europe have declined 80 percent on average, causing bird populations to drop by more than 400 million in three decades.  

Only a few species of insects—mainly in the tropics—are thought to have suffered due to climate change, while some in northern climes have expanded their range as temperatures warm.  

This is bullsheet speculating with no facts to say "mainly in the tropics -are thought to have suffered due to climate change" Then they state the authentic fact "some in the northern climes have expanded their range as temperatures warm" no speculation with that statement because that's what the observations show, warmer temperatures have been kind to insects as it has been to all life........they prefer it.

However, think about the billions of dollars being flushed down the toilet convincing people of a manufactured threat, from the increasing beneficial gas CO2 and beneficial warming.......when there is a real deal huge threat identified here, happening in the real world from real non CO2/climate related things.

We have a bunch of fake environmentalists, disingenuously telling us that we have 12 years to save the planet by cutting fossil fuels and CO2 emissions(which would do nothing except kill our economy) because of the fake climate crisis.............and they are not addressing the real crisis!!!!

Exactly 0(zero) animals have ever been harmed by breathing ambient levels of  CO2 and none would be even if we doubled the amount in the atmosphere. Same with insects that would benefit more than be harmed at higher levels of CO2. The climate crisis is manufactured.

The environmental crisis and dying insects and some other creatures is not.............but a fraud is being perpetrated by blaming fossil fuels/climate change.

Life on this planet would be best served by INCREASING the levels of beneficial CO2!