Tag Archive | window strikes

Lights Out For Migration!!

Apr30

Help migrating songbirds by keeping our night skies dark.

Spring migration is well under way, but as far as songbirds go, it will really pick up steam for the month of May. Songbirds migrate at night, and they can become disoriented by artificial light. This can cause them to be drawn off their normal path and into a more dangerous urban area, where they may collide with windows and other human structures, or be taken by predators.

Lincoln's Sparrow
Orange-crowned Warbler

Sparrows, warblers, and other songbirds will soon be moving through the city in large numbers. Lincoln’s Sparrow, Orange-crowned Warbler. Photos by Bob Lefebvre.

In 2021, Calgary became one of Canada’s first certified Nature Canada Bird Friendly Cities. Bird Friendly Calgary is the local organization whose mission is to highlight and mitigate threats that have contributed to a decline in bird populations of an estimated three billion over the last fifty years. As part of these efforts, Bird Friendly Calgary has a “Lights Out” initiative they would like to pass on to the local birding community. It is asking for everyone to turn off all unnecessary lights between 11:00 PM and 6:00 AM during the migration periods of spring and fall. For spring they are targeting April 1st to June 15th with special emphasis on the month of May. 

Please try to keep your houses and yards as dark as is safe at these times.

Lighted office towers are also a great threat to migrating birds and bats, and a huge number die or are injured each year in collisions with office buildings across North America. The Calgary Urban Species Response Team is active during migration in searching for such birds and bats in the downtown core, and trying to rescue any injured ones. The hope is that they can find out where the major problem areas are, and find ways to mitigate the loss of bird and bat life. See their site to find out more about this problem and the great work they are doing.

CMSRT Public Event Tomorrow, November 23

Nov22

On Saturday November 23 there will be a free public event to share the findings of the Calgary Migratory Species Response Team (CMSRT). The event runs from 12 noon to 1:30 pm, and everyone is welcome to attend!

This will take place at St. Mary’s University, 14500 Bannister Road SE, in Owerko Hall. The University is located east of Macleod Trail, just south of Fish Creek Park.

Come learn about the impact of bird and bat migration in an urban setting. The CMRST’s team of volunteers is on the front lines rescuing birds and bats that have been injured due to urbanization and compiling scientific data. Join us to learn how you can make a positive impact on the lives of migratory species living within our community. See the evidence of the CMRST’s work in monitoring birds and bats involved in window strikes in downtown Calgary, and in rescuing those that are injured.

This is a free family-friendly event. There is more information, including a map of the location, on the Eventbrite page linked to below, but there is no need to get a ticket – just arrive at noon to enjoy the programme below:

12pm – Welcome and Elder blessing.

12:15pm – Dr. Scott Lovell presents intriguing findings about bird strikes in the downtown core; Melanie Whalen speaks on found wildlife care and our findings on bats in the city.

12:45pm – Recognition of the generous contributions from our partnerships, volunteers, and stakeholders.

1:00 pm – Catered reception and specimen viewing – see the impact!

Go to the Eventbrite page here for more information.

Visit the CMSRT Facebook Page here.

Birds, Bats, and Building Collisions

Aug22

Posted by Bob Lefebvre

Window strikes, or birds colliding with windows, is a big problem – not just in residential yards, but in urban downtowns where tall glass structures are a big obstacle to migrating birds (and bats too). Many birds migrate at night, and skyscrapers can cause a lot of bird mortality. You may have seen some of the disturbing photos of hundreds of dead birds of many species that are collected in Toronto’s downtown every year by the Fatal Light Awareness Project (FLAP). A similar effort is undertaken in Ottawa by Safe Wings Ottawa.

Toronto, unlike Calgary, is located on a major migratory flyway. So how big is the problem here, and what can be done to minimize the damage? This is what Kathleen Johnson has set out to discover, by creating the Calgary Migratory Species Response Team.

Chipping Sparrow
A Chipping Sparrow found in downtown Calgary by Kathleen in the spring during one of her preliminary checks for birds killed by window strikes.

Kathleen has done an amazing job of assembling a team of experts and setting up a detailed and well-prepared group of volunteers to begin surveys of Calgary’s downtown. The CMSRT will plot the locations of all birds and bats found, to learn where the problem areas are. The Calgary Wildlife Rehabilitation Society is directly involved as well, so that any injured animals can be rescued.

CMSRT Poster

This weekend there will be a two-part orientation session for anyone wishing to volunteer. The first part will be an information and training session at the Central Library downtown, and the second part will be in the field (downtown) early Sunday morning. See the event on Facebook here.

Please visit the group’s Facebook page to learn more about this effort. You can also follow them on Twitter (@CalgaryResponse). If you want to volunteer, email them at calgaryresponse[at]gmail.com.

Tonight, August 22nd, Kathleen will give a brief overview of the project at the Birds & Beers event (6-9 pm, at the Legion at 9202 Horton Road SW) and will have more information available for anyone interested in getting involved. This is a really exciting initiative and I hope everyone can get behind it and help out!

Beyond the reflection: the dangers of windows

Aug24

Posted by Matthew Sim

As the fall migration starts to heat up and southbound warblers, vireos, flycatchers, sparrows and more pass through Calgary, birding can become quite exciting. While for us, this is a great time to be out and about, for the birds, it is dangerous; very dangerous. Migrating passerines (perching birds), for example, have to travel long distances all while on the lookout for predators such as hawks and cats, try to get food themselves and hope they don’t get caught in an early cold-snap which could potentially kill them. And this is just the beginning, there are even more dangers; one of them which is the most lethal of them all.

According to Sibley Guides Bird Mortalities, window strikes (when a bird hits a window) kill between 97 and 976 million birds each year, more than any other cause of bird deaths. (http://www.sibleyguides.com/conservation/causes-of-bird-mortality/).  I was in my neighbor’s yard when I noticed one of these fatalities on his patio. While I had been there, a migrating Ovenbird had struck his window and had died. Though birds can crash into  windows at any time of the year, window strikes tend to happen more frequently during migration as an influx of migrants come through unfamiliar territory, passing from tree to tree. As you can see in the photo below, it is quite easy for a bird to see its habitat reflected in a window and believe that it is simply another tree they are heading to; I’m sure most don’t know what hit them.

If I were a bird, I would probably fly towards these trees too.

Many bird populations are declining already due to a number of reasons and we don’t need to help them along with  reflective windows when we could easily prevent window strikes occurring.

This Ovenbird had struck my neighbor’s window while I was in his yard.

A closer look at the detail on the Ovenbird’s feathers

Probably the worst part of all this is that window strikes are senseless; it’s not like natural selection where it was meant to happen, window strikes are part of our devastating side effects on nature; however, they can also be easily prevented.

There are many ways to prevent birds from striking windows. If you are having birds fly from your feeders or bird baths into windows, you can either move these bird attracting features further away (25-30 feet) from the window or closer (1-3 feet) to the window so that if the birds do hit the window at just 1-3 feet they will not be going fast enough to do any harm to themselves.

Apparently, there is also a material called CollidEscape which can reduce reflectivity and transparency on the outside but still leave the windows transparent from the inside. You can check it out here.

Here are a few more options:

  • plant shade trees outside windows to break down reflections
  • install snap-on window dividers
  • put a hanging plant outside of the window

These are just a few of the ways you can avoid window strikes and help reduce the number of avian mortalities each year. Often, preventing window strikes can be as simple as closing the curtains or blinds when not using the windows. You can see even more solutions here.

If you have birds hitting your windows, there are many ways to stop it; help out bird populations!