From Ontario Hummingbird Sightings Reporting:

The migration season is in full effect across Ontario, with a significant increase in sightings reported over the past week. The current data indicates a high volume of activity concentrated in Southern and Eastern Ontario, with the majority of sightings occurring between April 26 and May 2.

Citizen science provides essential data for tracking the arrival of these birds and understanding their migration patterns from a scientific perspective. If you have spotted a hummingbird, please contribute your observation to the provincial record at hummingbirdscanada.ca.

When reporting, ensure you include:
• The exact date of the sighting.
• Your specific location within the province.
• Any notable observations regarding their behaviour.

Your contributions help honour the collective effort to monitor and protect these species.

https://hummingbirdscanada.ca