Yellow is such a cheery colour, and the sight of these bright yellow fungi during a walk on a particularly grey, gloomy day certainly brought a smile to my face.

Although there are two very similar-looking, yellow, jelly-like fungi, I’m 99% sure these are Yellow brain fungi (Tremella mesenterica) because they are parasitic on the Peniophora species of crust fungi (rather than the Stereum hirsutum fungi, on which the other yellow fungi Tremella aurantia are parasitic), and you can, hopefully, just make out the Peniophora fungi (the lilac-grey crust on the wood) in the photo immediately below.

I explained more about these two fungi in my blog Golden ears and Yellow brains, February 2017.