Help Birds Beat the Summer Heat
Water (or the lack thereof) can be deadly serious for birds. Birds must be ready to fly at all times, and bathing is a critical part of feather maintenance and staying in top-flight condition. Whether they are feeder visitors or not, birds need water. Offering a dependable source of water is probably the simplest and most important step you can take to greatly increase the variety of birds in your yard.
Water is also vitally important when it's extremely hot and a bird’s ability to regulate its body temperature can become stressed. Birds do not sweat and must remove excess body heat through their respiratory system. So when temperatures rise, a bird's respiration rate increases, sometimes to the point that it can be seen panting like a dog. This activity dehydrates birds and increases their need for a reliable source of water to replace lost fluids.