marsh eagle
Just like Parque Fernando and Rancho del Arroya reserves, Mississippi Acres also has increased noise level (one red bar) when walking on short green grass even with the noise reduction perks.
On a related note, thank you so much for the noise reduction in Medved-Taiga and Hirschfelden reserves.
NB: For some reason Revontuli also has very noisy grass despite having the noise reducing perks.