Yellow Field Caps are an extremely wide spread mushroom found throughout North America. It is particularly prolific on compost, wood chips, and manure. These mushrooms are saprotrophic and change from egg like and sappy to flat topped and drier as they age.

Yellow Field Caps where first described by French mycologst Jean Baptiste Francois Pierre Bulliard in 1789, giving it the name Agaricus titubans. Later, in 1838 it was renamed to Bolbitius titubans, after it was originally placed in an over arching category.

Sources:

https://www.first-nature.com/fungi/bolbitius-titubans.php

https://www.mushroomdiary.co.uk/2014/04/yellow-fieldcap-mushroom-bolbitius-titubans