Eastern North America has only one hummingbird, the ruby-throated hummingbird (Archilochus colubris), but in late fall after the ruby-throats have left for the tropics a few western hummingbirds come east.
Rufous hummingbirds (Selasphorus rufus) breed in the Pacific Northwest to Alaska and spend the winter along the Gulf Coast and in Mexico. Their range map says they don’t occur in the eastern U.S., not even on migration.
However, beginning in late October, a few show up in Pennsylvania. Some even reach the Atlantic Coast. An eBird map of rufous hummingbird reports from October to February, 2019-2022, shows them dotted across the eastern U.S.
So don’t take down your hummingbird feeders yet. Watch for a very special rare hummingbird — so rare that ornithologists will want to band it(*).
See a closeup of a banded rufous hummingbird, learn about their habits, and find out about the even rarer Allen’s hummingbird at:
(*) Information on who to call in Pittsburgh if you get a rufous hummingbird at your feeder is in the article above.
(photo and range map from Wikimedia Commons; screenshot map of eBird reports; click on the captions to see the originals)
As the September wave of migrating warblers disappears to our south the next wave of birds has arrived from the north, among them ruby-crowned kinglets (Corthylio calendula). These tiny dynamos resemble the plainest warblers and vireos but are so unique that it’s worth taking a closer look at them.
For starters, though ruby-crowns are called kinglets they are no longer in the same genus as golden-crowned kinglets (Regulus satrapa). In 2021, thanks to DNA and some very unique traits, the AOS placed them in a genus all their own: Corthylio.
Smaller than any warbler, ruby-crowned kinglets are olive-green with somewhat whitish bellies. Their most reliable trait is their constant wing-flicking, punctuated by rapid darting to and fro. They also have:
Two white wingbars,
Big white eyerings broken above and below,
A tiny beak
No neck
A proportionally larger head compared to the look of a warbler
Thin black legs with golden feet
A dry call note and a rousing song
Males have red or orange feathers hidden atop their heads which they raise when agitated.
On any particular bird you may never see a ruby crown. The females don’t have them and the males are not always agitated. However if you keep watching, a bird may come close to watch you, then raise his crown when he figures out who you are. Maybe this curious ruby-crown is female.
Ruby-crowned kinglets are short-distance migrants that breed in spruce-fir forests in Canada and the northern/mountainous U.S. They spend the winter in southeastern Pennsylvania but are rare in western PA outside of migration. October is the time to see them in Pittsburgh.
Learn about these energetic birds in an 8-minute video by Lesley The Bird Nerd. Watch for the wing-flicking!
Yesterday Charity Kheshgi and I visited Nick Liadis’ bird banding project — Birdlab — at Hays Woods, the City of Pittsburgh’s newest, most remote, and least developed park.
Nick runs Birdlab at three sites: Hays Woods plus at two private properties, Upper St. Clair and Twin Stupas in Butler County. During migration Nick is out banding six days a week unless it’s raining or windy.
Hays Woods is unique for its size and habitat so close to densely populated Downtown and Oakland. Like an oasis it’s an appealing stop for migratory birds. We were there to see Nick band five birds on a slow day compared to the day before when he banded 60!
Oakland is visible from the Hays Woods powerline cut.
Nick has placed the mist nets in a variety of habitats. They are intentionally hard to see. When birds see the nets they avoid them.
Every 30 minutes the banders walk the nets to check for birds. Lisa Kaufman assists at Hays Woods on Wednesdays. Here she is walking the powerline cut.
Each netted bird is gently placed in its own cloth bag and brought back to the banding table. Here Nick tells Lisa what time to record.
It’s an ovenbird.
To age the birds Nick checks their wings, tail and body feathers for molt stage. Below he points out the very faint fault bars on the tail feathers that indicate feather growth. If all the bars line up, then these tail feathers grew in at the same time, which means the bird is still wearing his very first tail feathers and thus hatched this year.
Nick blows on the belly of a Nashville warbler to check the lump of fat that is fuel for migration. This Nashville warbler had a high fat score so he may be ready to leave tonight for his wintering grounds in Mexico.
Nashville warblers are one of the smallest birds but it’s not noticeable until they are in the hand. Nick prepares to apply the band.
Nick holds an ovenbird after banding.
Each of us got to release a banded warbler.
And we learned how much northern cardinals hate to be captured. Cardinals of all ages screech and bite! We were grateful not to hold one.
To learn more about Nick’s banding project and schedule a visit, see his website at birdlab.org.
It was a wonder in 2014 when, after centuries of ornithologists saying that only male birds sing, Karan Odom at University of Maryland documented singing females. Most of the species live in the tropics but even back then 150 female-singing species were documented in North America.
Mockingbirds are also unusual because they sing in autumn when other birds are silent. They do it because they change location. Those that nest in the northern end of their range migrate south while others move locally (see animated eBird map). When mockingbirds “reappear” in September they are singing again to claim new territory.
Males and females look alike and they aren’t paired up in winter so we cannot tell which sex is singing. Nevertheless we can hear them. Here are some examples.
28 Sep 2021 in Cincinnati, Ohio:
7 Nov 2019 in Harlingen, TX:
I see mockingbirds in Pittsburgh in the winter. Are they local transplants or from further north? Are they male or female? I dunno.
(photos by Cris Hamilton and from Wikimedia Commons; click on the caption to see the original)
A year ago in Schenley Park we had such a slow birding day that I wrote, “We worked for every bird.” A year later, nine of us were there yesterday and the birding was even slower! (14 species instead of 19.) However we found lots of insects and two white-tailed bucks in velvet. Here’s the story in pictures, thanks to Connie Gallagher.
Connie saw the very Best Bird, a blue-gray gnatcatcher.
We pondered the identity of these wasps and then remembered, all at once, that they are bald-faced hornets (Dolichovespula maculata), a type of yellowjacket wasp.
There was still dew on the wild senna as this bumblebee gathered nectar.
The browseline is so severe in Schenley Park that there’s no cover for the deer who sleep there during the day. Looking down from the Falloon Trail we saw two bucks, a 7-point buck (at top) and a 10-point below.
Fortunately some of us heard these birds flying overhead. I can tell their identity by shape and the yellow tips of their tails. Cedar waxwings.
Here’s the group that worked for every bird on Sunday. Thank you all for coming!
What do you do when your nest and babies sail away without you? A house finch couple on Pittsburgh’s North Shore have learned to wait for the boat to come home.
This spring a pair of house finches (Haemorhous mexicanus) were very quick to build a nest atop a loud speaker on the aft deck of the Rivers of Steel Explorer, docked behind the Carnegie Science Center. By the time the crew caught up with them the female had finished the nest and laid eggs, so the nest had to remain undisturbed until it was empty.
When would it be empty? Not yet. In August? In September?
House finches are masters at back-to-back nesting, raising three to six broods per year. As the young approach fledging the male takes charge of them while the female starts the next round of egg laying. On the Explorer the female doesn’t pause between one brood and the next.
When I met the Explorer finch family on 26 July they had already raised several broods and were caring for young approximately two days old. While our tour waited on deck for the boat to depart the father fed three tiny nestlings. They are growing fast! Here they are three days later on 29 July.
Our tour pulled away from the dock and I forgot about the house finches for 90 minutes while we traveled Pittsburgh’s three rivers. Mother and father house finch were absent but they had not forgotten. Waiting on shore they were so attuned to the habits of the Explorer that when the vessel maneuvered to dock they raced across the channel to the aft deck. “The kids are home!”
The Traveling Nest is one of many birding highlights on Rivers of Steel Explorer tours. Captain Ryan O’Rourke explained, “In addition to hosting a bird-watching cruise with the National Aviary, part of our educational program for students includes a lesson in birding and how birds can be indicators of the health of our rivers.”
Is there a bright yellow bird with black wings in your vegetable garden poking among the salad greens? Or perhaps a drab female or juvenile bird (shown below)?
American goldfinches (Spinus tristis) nest in July so they are very busy bringing food to their young.
Their favorite choice is thistle seed, above, but they will occasionally taste reddish salad greens like Swiss chard, below.
Don’t worry for your garden. Goldfinches only take a nibble.
Find out more about the “Salad Birds” in this vintage article:
(photos from Wikimedia Commons; click on the captions to see the originals)
Whoosh! Fast moving birds circle, swoop, rise and fall as they eat flying insects. Swallows and swifts move so fast that it’s hard to identify them in flight. With one swift and six swallow species in our area(*) the first step is to decide: “Is that a Swallow or a Swift?“
This stop-action photo by Patrick bx (@bronxfxdc) makes it easy to see the differences described by audubon.org below.
Color: If the bird has any color, it’s a swallow. Chimney swifts are dark brown all over (see top image). Many swallows are colorful or iridescent. Most have white bellies.
Flight style: Chimney swifts flap their stiff wings so fast that they look like they flip on their body axis. Swallows bend their wings as they flap in “swallow-like” flight.
Perched? If the bird is perched or standing on the ground it’s a swallow. Chimney swifts cannot stand on the ground and cannot perch at all except to cling upright inside a chimney.
(photos from Patrick bx (@bronxfxdc) embedded tweet & the Crossley ID Guide to Eastern Birds via Wikimedia Commons; click on the captions to see the originals)
Mid to late summer is a good time to be a bird in Pennsylvania. Fruit is ripe, seeds are plentiful, insect food is everywhere and for raptors there are plenty of naive young animals to capture. With so much natural food available and with songbirds’ preference for insects in summer, birds are not dependent on backyard feeders in July.
You can safely bring in your bird feeders now. In fact, if you cannot clean your feeders every week, they are unsafe for birds. Highly pathogenic avian flu has ebbed this summer but there is apprehension that it will return during fall migration. And it’s not the only disease that kills birds.
Yesterday I encountered three dead or dying birds in my neighborhood within half a mile of each other: a house finch that fell over unless it propped itself on open wings, a dead fledgling robin standing in the street (below), and a fluffed house sparrow that could not walk.
I have no idea what was killing them. It could have been a different reason for each species. I do know that if it was contagious, finches and sparrows would have spread it at bird feeders.
Male song sparrows sing to claim territory and avoid fighting with rivals. Each male has a unique song that creates an audio boundary marker that other males are expected to honor. When a rival intrudes, the owner escalates with aggressive signals before he attacks. If you know what to look for, you can tell when a song sparrow is angry.
The owners reacted to the stuffed singing intruder as if he was real and escalated as follows:
When the intruder first arrived, the owner matched the intruder’s song. If this didn’t drive off the intruder …
The owner repeatedly flew and landed near the intruder, wing-waving and singing softly. “Wing waving” is vibrating one wing at a time. Soft song is more aggressive than shouting.
When none of this worked the owner attacked the intruder.
This video from the Univ of Washington shows the second step — wing waving and soft song — with narration by one of the researchers. Notice one wing raised and waved at 0:27. Wing raising is a happy greeting between male and female cardinals. Not so with song sparrows!
The stuffed intruder would not leave, even when the owner sang softly, so the owner attacked. Yow!