Newmilns population can be found nearby. To the west of Newmilns, local residents have sighted kingfishers along the riverbank which, although elusive, are a popular aspect of the river's biodiversity. Newmilns is also home to a large bird population. The jackdaw is perhaps the most common resident and can be found nesting and feeding in buildings and gardens throughout the town. Accompanying the jackdaw are its close relatives, crows and rooks (rooks are generally found on the outskirts of Newmilns) alongside a variety of other birds including the swift, swallow, sparrowhawk, wren, dunnock, robin, starling, pied wagtail, spotted flycatcher, magpie, dipper,
Common ostrich is scarce in dry and hot environment, and this poses a challenge to the ostrich's water consumption. Also the ostrich is a ground bird and cannot fly to find water sources, which poses a further challenge. Because of their size, common ostriches cannot easily escape the heat of their environment; however, they dehydrate less than their small bird counterparts because of their small surface area to volume ratio. Hot, arid habitats pose osmotic stress, such as dehydration, which triggers the common ostrich’s homeostatic response to osmoregulate. The common ostrich is well adapted to hot, arid environments through specialization of excretory