WEATHER-RELATED GROUNDING OF SONGBIRDS AT MACHIAS SEAL ISLAND DURING MIGRATION.
Many of our migrants move by night, at least in part to avoid predators. They sit down in the morning, spending the day resting and re-fuelling.
Most will resume their journey the next night although those in greatest need may stay longer.
When the weather is favourable the vast bulk of the migrants will maximize their distance and by-pass the closer or less inviting stops along their route, places like Machias Seal Island.
However, if they attempt to move in adverse weather or especially if they encounter adverse conditions while enroute over water, birds may be forced to seek any available landfall; islands and even boats. Sometimes masses of exhausted birds will simply expire in the water.
Machias Seal Island serves as a Convenience Store in fair weather. Needful birds stop to rest and get a snack to sustain them until they reach a better stop-over.
In adverse weather, the island serves more as a Life Boat, providing a landfall for many desperate, exhausted flyers. These are the stereotypical "fall-outs".
This is a compilation spread over 15 years (2005 - 2017) and shows both ordinary night flights and drop-out events.
The small groups and individual birds are a sampling from both fair and foul weather. Some of the older images have been published previously.
Thank you--I had the good fortune of being on the boat trip to the Island on Memorial Day weekend as part of the Downeast Birding Festival--around 2007--and witnessed a massive fallout. Every horizontal surface was carpeted with birds, many climbing over others. Ravenous, bedraggled from storms the keeper was spraying out as much food as he could. It was an opportunity to see many types not easily viewed normally.
Annette Gosnell
26-Sep-2017 15:44
Fascinating & fantastic. Thanks so much for sharing this and all your posts to Maine-birds
Guest
26-Sep-2017 09:56
Ralph, Thank you very for these wonderful photographs. I have saved photos of a fallout that you sent back in 2011 and have studied them often. Your generosity in sharing your observations from this remarkable vantage point has provided the opportunity to experience these migrants of the night. Jennifer Multhopp, Lubec