At the end of October 2020, we watched the Chimney Swifts fly southward to their nonbreeding grounds in South America through citizen scientist sightings in eBird. As we approach the time when the swifts return here in Manitoba, I thought we could take a look at where they were sighted over the winter – and where they are now.
First, a quick reminder of the Chimney Swift breeding, migration and nonbreeding ranges.
There are fewer observations of Chimney Swifts in their nonbreeding range, so I have combined the months of December, January and February together in the map below. You can see that swifts were sighted in Belize (4 swifts seen on Dec 5), Costa Rica (28 swifts seen from Dec 2-Jan 24), the Cayman Islands (1 swift seen on Feb 4), Peru (1 swift seen on Dec 29 and 1 on Jan 4) and Chile. It is strange for me to think of our “local” birds being seen on the same birding list as Tinamous, Toucans, Trogans and Parrots! Check out this eBird list from Peru where there must have been some great birding (in addition to Chimney Swifts, of course) https://ebird.org/checklist/S78853414
The sightings in Central America are outside of what is thought to be the non-breeding range. Were these individuals on migration? Or did they spend the winter in Central America instead of heading a bit further south? Chimney Swifts are as much of a mystery (if not more) at the non-breeding grounds as they are when they nest in Manitoba! For the Chimney Swifts reported in Belize – the birders made a note that the swifts were in migration still moving southwards, however the other sightings are unknown.
Map of Chimney Swift sightings in eBird.org for December 2020 and January-February 2021.
Our next map is for March 2021 and you can certainly see that Chimney Swifts are on the move! A big difference from the locations that we saw from the winter. You can see swifts moving up Central America, arriving at the Gulf Coast and then moving up through the United States. Although many individuals are still in the lower states, there is one enterprising group (4 swifts) that was seen by a citizen scientist in Lansing, Michigan reported on March 25th.
Map of Chimney Swift sightings from eBird.org for March 2021.
Chimney Swifts usually start arriving in Manitoba from May 1st (earliest) onwards, so another month and a bit before we will start seeing the swifts here. MCSI is preparing our 2021 season protocol for our Chimney Swift monitoring program – and we look forward to working with all of our volunteers in 2021. I will update our blog with more swift migration action near the end of April – so keep an eye out!
— Amanda Shave
