Well, a bird landing in fresh water dies in minutes (unless it's a water bird).
Did you know that birds are generally susceptible to damage? They fly in front of cars, fly into windmill blades, fly into windows, crash into trees in a windstorm, fly through the focal point of a solar still, walk on train tracks when a train is coming, get shot at by hunters, land in wet concrete, land in salt lakes, attacked by cats and dogs, etc. It really doesn't take much to dispatch a bird.
Fortunately, they breed quickly. There will always be birds to provide that note of beauty to the sky.
As to the leach fields...here are the actual problems with them:
Lithium ore is generally found in desert environments, usually quite remote (note the background in the picture above, as an example). The leach fields require water and plenty of it. Not really available in the desert.
Leach fields also require a strong acid, such as sulfuric acid, and the leaching process results in sulfur (the yellow color in this image you provided), and sulfur oxides (such as sulfur dioxide, a toxic gas). Leach fields are, however, in remote areas...just like the lithium ore that is being processed in them.
A LOT of lithium ore must be leached out in this way to produce just a few batteries.
Lithium is not a renewable material. Neither is cobalt (even harsher environmental impact, not to mention the child slavery to mine it). As these materials become used up, the price of batteries will necessarily go very high, adding to the already extremely high price tag for an electric car.