Starling Murmuration thermal camera

I have recently bought a seek thermal camera for iphone (link here) and been testing it out. The starlings are flocking and creating murmurations now. I thought I would see if much heat comes out. It resulted in a murmuration as not before seen. You can see the heat from the murmuration against the background. The temperature reading in the second half doesn't register the starlings as they are flying too fast too pick up.