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Fledglings

Baltimore Orioles Fledging

6-28-19 baltimore oriole family 0U1A0415After arriving back in Vermont in May, Baltimore Orioles mate, build their nest (female only) near the tip of an outer branch of an isolated tree (discouraging predation), lay eggs and incubate them for about two weeks before they hatch.

After spending the next two weeks in the nest, most nestlings are ready to fledge. It is at this point that you can actually see the nestlings as they cling to the outside of their pendulous nest, or perch on its rim as they noisily await the arrival of a parent with an insect morsel. Upon fledging, they can fly, but not very far. The parents will continue to keep an eye on them and feed them during these vulnerable first two weeks out of the nest until they can fend for themselves. (Many thanks to Nina and Jerry Hickson for photo opportunity.) (Photo: Male (topmost bird), female and nestling Baltimore Oriole)

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American Kestrel Chicks Fledging

 

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The American Kestrel is the smallest, most numerous, and most widespread North American falcon. Roughly two months ago these birds (formerly known as Sparrow Hawks) were mating and laying eggs in nesting cavities (natural tree cavities, woodpecker holes, nest boxes), most of which are located near open fields with low growth (to facilitate finding insects to eat).  The female kestrel does most of the incubating of her four to five eggs (one month), and all of the brooding (one month).  The male rises to the occasion and feeds the newly-hatched chicks for the first 7-10 days, and then the pair shares the feeding.

After 26 – 28 days in the nest, American Kestrel chicks are ready to fledge.  Their first flight, consisting of alternate fluttering and gliding, can be quite short or as long as 200 yards, and typically ends with an awkward landing.  After the chicks have fledged, the parents continue to feed them for up to 12 days. During this period young American Kestrels have been observed returning to their nest cavity to roost.

(Photo:  Male American Kestrel nestling, roughly 22 days old. Note feathered “eye” spots on back of head (serve to ward off predators) are already showing. Thanks to Joan Waltermire, John Douglas, David Merker, and Sebastion and Carter Lousada for photo op.)

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Barred Owls Fledging (But Not Flying Yet)

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If you heard Barred Owls calling this winter, and have occasionally spotted one in the same vicinity this spring, now is the time to start looking up at the canopy to see if they produced any young owls. Having spent four or five weeks in a tree cavity being fed and cared for by their parents, Barred Owl nestlings get the urge to spread their talons (and eventually their wings) and leave their nest about this time of year. It will be roughly another month before they begin short flights; until then the fledglings are referred to as “branchers,” as that is where you will find them, perched and begging for food from their parents, who will continue to feed them until late summer or fall. (If you know a youngster who is captivated by owls, they might enjoy reading Otis the Owl by yours truly!)

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Common Ravens Fledging

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Amazingly, there are birds that are fledging from their nests this early in the spring, among them Common Ravens. The intelligence of this species is well known, but perhaps less familiar are their antics, especially those of young birds.

Common Ravens have been observed “sliding down inclines on their belly, lying on their side grappling sticks, dropping and catching objects while in flight, hanging upside down by one or two feet, snow “bathing,” giving vocal monologues, caching inedible items, playing “tug-of-war” or “king-of-the-hill” with other ravens, and pecking predators on the tail.” (Birds of North America Online) If you hear their guttural call from above, be sure to look up and enjoy the show. (Photo: Common Raven fledgling. Thanks to Erin Donahue and Charlie Berger for photo op.)

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Barred Owl Parents Providing Fledglings With Food

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Young Barred Owls are fed from the time they hatch (four to six weeks old) until late summer or early fall, months after they have fledged and long after they are capable of flight. When first out of the nest, the fledglings cannot fly, and thus are totally dependent upon their parents’ continued delivery of prey. The fledged young initially stay near one another and the nest site. The parents continue to feed them, and as the young become more mobile they slowly move away from the nest tree. Flight is attempted between the ages of 12 and 15 weeks. The first attempts are, as you would imagine, rather awkward, but as their wings strengthen, the young owls’ flying skills improve. Even so, the parents continue to feed them through the summer and often into the fall, when prey deliveries slow down and eventually cease, forcing the young to disperse. (Photo: Recently-fledged Barred Owl chick eyeing the Flying Squirrel its parent is delivering.)

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Barred Owl Chicks Fledging

5-25-17 barred owl fledging2Unlike most young birds, Barred Owls fledge before they can fly. On average, they leave their nest when they are around eight weeks old, and don’t master flight until they’re about 12 weeks old. Fledging for a Barred Owl consists of climbing up out of the tree cavity where they spent their first two months, onto a nearby limb where its parents will tend to it. More often than not there is a nearby branch which it can hop to.

In the fledging depicted, the closest limb was a good 10-15 feet above the nesting cavity. With the help of its strong talons, beak and wings, the fledgling managed to scale the tree trunk up to a somewhat horizontal stub where it could get a good purchase. It may not have been the most graceful ascension, but the fact that it could manage to climb straight up for this distance without the assistance of any grasping fingers was impressive, to say the least.  Fledged Barred Owls continue to be fed by their parents until they can fly and capture their own prey.  (Photo: Barred Owl chick fledging – clockwise, starting from upper left)

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Great Horned Owl Fledglings Still Being Fed By Parents

great horned owls-first year IMG_1616Great Horned Owls are one of the earliest nesting birds — you can find them on nests in January, February and March, even in northern New England. Eggs are incubated for about a month, typically in March or April with young usually hatching in May or June. The nestlings remain in the nest for six or seven weeks before fledging. Unable to fly until they are ten or twelve weeks old, the fledglings follow their parents around and continue to be fed and cared for by their parents until fall. In late summer, when they have fledged but are still begging their parents for food, you can hear their distinctive calls. To know what to listen for, go to http://langelliott.com/mary-holland/great-horned_owl.mp3 (Sound recording © Lang Elliott – langelliott.com & miracleofnature.org.)

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