Does fertilizer kills birds you are asking because you fertilized your grass and now the seagulls are eating it can this be harmful and if so how do you stop them from eating it thanks?

Fertilizers themselves typically do not kill birds, but they can contaminate the food chain if they run off into water sources, potentially affecting bird populations indirectly. If seagulls are eating grass treated with fertilizer, it's a good idea to limit their access to the area until the grass has had time to absorb the nutrients and dry out. You can deter seagulls by using physical barriers, such as netting, or by employing scare tactics like reflective objects or noise-making devices. Always follow the manufacturer's guidelines when using fertilizers to minimize any risks to wildlife.