Zephyr (American Kestrel)
Falco sparveruis
Kestrels,
sometimes called sparrow hawks, are actually a kind of falcon. They are one of the smallest and most common
falcons found in the Central Valley.
They are close to 11 inches tall with a wingspan of 1 ˝ to 2 feet. Their body coloration varies with
gender. The males have blue-gray wings,
reddish brown backs and tails, and light-colored chests and abdomens. The females are duller in color, lacking the
bluish wings, but are speckled and barred creating a camouflaged effect. Both have striking black markings on each
side of their faces. They are a small birds, so they become prey themselves for
larger birds of prey. A defensive
adaptation they have is black markings at the back of their head slightly above
their necks. These markings give the appearance
of eyes. Even when they are unaware of a
threat, they are protected since any larger birds think that the kestrel is
looking right at them losing any element of surprise. Their prey ranges from rodents 
to
small birds. As with most falcons, they can
fly very quickly in pursuit of birds.
They also can hover over prey like a kite. Their vocalization is an easily
distinguishable feature—a chattering, scolding call.
Zephyr arrived in spring 2017 from a family who habituated him to
the point that he lands on your shoulder, takes food from you, etc. We are
currently working with him, so he can become an educational bird. He certainly seems to have the right
disposition.