If our city pigeons were this beautiful, would we take them for granted?
The pink-necked green pigeon (Treron vernans), a native of Southeast Asia and Indonesia, is a fruit-eating forest bird well adapted to human landscapes. Graced with the colors of a pastel rainbow, the male is sometimes called the rainbow dove.
Despite the female’s camouflage, nesting safely is a challenge. When she sees a threat approaching she opens her wings to look larger but her display doesn’t scare off the male Asian koel (Eudynamys scolopaceus) who successfully steals her eggs. (Despite their appearance Asian koels are cuckoos, not crows.)
As for the pigeons, they will court and lay a new clutch very soon.
Once again it’s time to count wild turkeys (Meleagris gallopavo) in Pennsylvania.
Every year the PA Game Commission conducts a statewide Wild Turkey Sighting Survey, July 1 to August 31, to collect data on the size and makeup of our wild turkey population.
They ask for the public’s help to report what we see on the Turkey Brood Survey website. It’s pretty easy to do.
In spring a change occurs in mourning dove behavior as large flocks we see in winter disperse to nest. Some flocks move north while locals break up into couples and fan out to choose a territory.
It is hard to notice when the change occurs so I graphed my eBird count of mourning doves (Zenaida macroura) in Frick and Schenley Parks, January 2021 through 9 April 2022.
My eBird counts of mourning doves in Frick & Schenley, 1 Jan 2021 through 8 April 2022 (data from Kate St. John)
The change is pretty dramatic. Just 1-5 birds from March through September, then over 40 December through February. The largest flocks were at the Frick Environmental Education Center where they sunned in the trees above the feeders. 100 mourning doves in January!
This year the count dropped below 10 in early March as they paired up. Some pairs maintain their bonds throughout the winter. Others get to know each other in the spring.
On territory the male visits potential nest sites and calls to his mate to inspect them. She gets to choose. (His nest call is 3 notes like this).
According to Birds of the World: To build the nest he brings small twigs, etc. which he delivers to her while standing on her back(!) She arranges them around her while using her body to form a simple bowl. Nest building usually takes 7–10 hours spread over 2–4 days.
The loosely built nest looks messy. Sometimes you can see through it from below.
And in October mourning doves gather in flocks again. The process starts over from flocks to nests.
UPDATE 13 April 2022: Today at Frick Park I talked with someone who has a mourning dove nest in their yard while 16 mourning doves hung out near the feeders. Flocking and nesting were simultaneous today.
(photos from Wikimedia Commons; click on the captions to see the originals)
Avian influenza, also called bird flu, is in the news lately because a highly contagious strain has made it to North America from Eurasia. Though not dangerous to humans, this year’s strain is easily caught by some bird species, most notably chickens. Here’s what it is and what we can do to protect birds.
What is this virus?As USDA explains, “Avian influenza is caused by an influenza type A virus which can infect poultry (such as chickens, turkeys, pheasants, quail, domestic ducks, geese, and guinea fowl) and wild birds (especially waterfowl).” Various strains are always in the wild but the low pathogenicity versions do not cause illness in wild birds or chickens. Every few years, however, a highly pathogenic (HPAI) strain surfaces that is extremely infectious, fatal to chickens, and rapidly spreads in domestic poultry.
This year’s HPAI strain has already devastated many poultry farms.
Which birds have died? USDA is tracking the virus and reports that millions of commercially raised chickens and turkeys have already died this year. As of 7 April 2022 the total death count was more than 24.2 million, the vast majority of which — more than 16 million — were Commercial Layer Chickens. That’s why the price of eggs has gone up. (See USDA commercial and backyard flock statistics here.)
If you are a poultry farmer, have backyard chickens, or have captive birds in a zoo or rehab facility you’ll want to heed USDA’s advice to protect your birds. Accordingly the Pittsburgh Zoo, the National Aviary, and HARP’s wild bird rehab facility in Verona are taking precautions. (See this Post-Gazette article.)
Should we worry about wild birds? Not so much. Wild birds maintain their own social distancing whereas domestic poultry live in crowded conditions on factory farms.
In addition, avian flu is primarily caught by ducks, geese, swans, chickens, wild turkeys, pheasants and quail. Some raptors catch it, though in low numbers. Songbirds are at low risk.
As of 7 April 2022, USDA testing of dead wild birds has found 637 cases in the U.S. 88% were water-related birds, notably mallards and snow geese. 11% were raptors. The highest raptor death toll was among black vultures who roost communally. (See USDA wild bird statistics here.)
Notice the order of magnitude here: 24.2 million poultry deaths versus 637 wild bird deaths.
Interestingly, the species most susceptible to avian influenza are closely related and stand alone in the the phylogenomic supertree below (pale green branch at bottom right) while those least susceptible are least related to ducks and chickens.
And finally, here are two quotes from the New York Times:
Nearly all the nine billion chickens raised and slaughtered in the United States each year can trace their lineage to a handful of breeds that have been manipulated to favor fast growth and plump breasts. The birds are also exceptionally vulnerable to outbreaks of disease. “They all have the same immune system, or lack of an immune system, so once a virus gets inside a barn, it’s going to spread like wildfire,” said Dr. Hansen, the public health veterinarian.
Andrew deCoriolis, the executive director of Farm Forward says: “Instead of asking how factory farms can prevent infections that originate in the environment, which is how they frame it now, we should be asking how they can prevent infections that originate on factory farms,” he said. “If we keep raising more and more animals in these conditions, we should expect the exact outcome we’re getting because that’s how the system is set up.”
Chickens were domesticated 5,000 years ago so this finding upends the notion that they came first.
Who was domesticated before chickens?
Before agriculture began 10,000 years ago, humans were nomadic in their search for food. The first two animals to be domesticated — dogs and sheep — were easily nomadic as well.
Agriculture prompted humans to form permanent settlements, which led to a spurt of animal domestication to keep the meat supply nearby. Here’s the list from dogs to chickens.
Wild turkeys in Pennsylvania (photo by Steve Gosser)
10 February 2022
In January the PA Game Commission kicked off of their largest ever study to count and track wild turkeys (Meleagris gallopavo) in Pennsylvania.
Pennsylvania’s wild turkey population has varied over the years from near extirpation in the early 1900s to a recent peak in 2001. The birds move around. When this graph began in 1995 there were probably no turkeys within the city limits of Pittsburgh. Now they are fairly common in Pittsburgh’s suburbs and the City’s large parks and greenways.
Since wild turkeys are game birds, PGC has always tracked the annual harvest numbers but now, to better understand turkey population dynamics, they will band more birds and track the movements of hens. To do so they will temporarily trap a flock to apply bands and, in WMUs 2D, 3D, 4D and 5C, they will tag 100 hens with transmitters. Click here for a WMU boundary map.
The PA Game Commission is asking the public to help locate flocks for the project. Report the location of any turkey flock you see between now and 15 March 2022 at this link: https://pgcdatacollection.pa.gov/TurkeyBroodSurvey. Rest assured that the project is not going to hurt or move any turkeys as PGC explains:
Birds are being leg-banded for population and research purposes ONLY.
GPS transmitters will be put on 100 hens in 4 WMUS (25 in each).
All turkeys trapped will be released on site – they will NOT be moved.
Location data are only used for research purposes (not law enforcement).
I’m tempted to enroll Frick’s and Schenley’s wild turkeys because I’d love to find out where they come from and where they go but they’re probably not eligible for the study. However we may learn the origin of new recruits when we see banded turkeys in the years ahead.
Where did you come from, turkeys?
Wild turkeys visit the garden outside WQED’s lunchroom, 30 Nov 2011 (photo by Stephen Baum)
When we gather over turkey this week we won’t be thinking of the wild birds that inhabit our parks and neighborhoods. But wild turkeys will be social gathering, too, in flocks that are like extended families.
Members of wild turkey (Meleagris gallopavo) flocks are often siblings. The males are usually brothers and though only one male, the dominant brother, gets to mate with the ladies the brothers work together to protect their territory. This 2013 article, Band of Brothers, explains the pecking order.
Sometimes the band of brothers causes trouble. For instance, they don’t recognize their own reflection so they attack those turkeys on the shiny car.
Moral of the story: If you part outdoors in turkey country, it’s best to have a dirty car.
Queleas live only in Africa and thrive best where human grain crops provide abundant food. Queleas correlate to humans too, but not nearly as much as chickens.
Catch me if you can! Male ring-necked pheasant, Nov 2020 (photo by Steve Gosser)
Thanksgiving Day, 26 November 2020
This month bird photographer friends Steve Gosser and Cris Hamilton have not taken many pictures of wild turkeys in western Pennsylvania but they have certainly found photogenic ring-necked pheasants. As Steve said on Facebook:
The last two weekends I’ve been driving around everywhere trying to find some of the rare winter finches currently moving down through our area, but all I keep finding are Pheasants.
Males pheasants are bold and colorful with blue head feathers that they can raise like horns (click here to see).
Male ring-necked pheasant, Nov 2020 (photo by Cris Hamilton)
Ring-necked pheasant pauses for a beauty shot, Nov 2020 (photo by Cris Hamilton)
The females are brown but not boring. Both sexes perk up when a human appears on the scene, pausing and staring as if to say, “What is that person doing?” Sometimes they run.
Female ring-necked pheasant, Nov 2020 (photo by Steve Gosser)Female ring-necked pheasant stepping out (photo by Cris Hamilton)
Native to Asia, ring-necked pheasants (Phasianus colchicus) were introduced as game birds in Europe, North America, Hawaii, Australia and New Zealand (see map). They’ve never become invasive because the pen-raised birds lack the survival skills they need to make it long term in the wild. Pausing to stare is probably their downfall.(*)
Why are ring-necked pheasants so plentiful in western PA? They’re stocked every year by the Pennsylvania Game Commission. Here are some high counts of ring-necked pheasant releases in 2019:
1,470 at SGL 203 in Marshall Twp Allegheny County
3,640 at SGL 95 (The Glades) in Butler County
1,920 at SGL 284 (Schollards Wetlands / Pennsy Swamp / Black Swamp) in Mercer / Lawrence County
p.s. I’m thankful for all the photographers who let me use their photos. These are by Steve Gosser and Cris Hamilton.
(*) Pheasants are birds of open land. They did well when much of Pennsylvania was farmland but now that the state has reverted to forest wild turkeys are doing well and pheasants are not.
_(1).jpg)
