You can see an egg as the bird changes positions while incubating. |
This nest pole was erected in 2001 in response to ospreys attempting to build a nest on an electric line.
Both osprey worked together to create the nest, with the male bringing in up to 4’ long branches, and the female inter-weaving with other sticks in the nest. Once eggs are laid (typically 1-3), the osprey take turns incubating the eggs. When the chicks are 10 days old, they are already mobile and eat 1-3 lbs. of food per day.
You might also be interested in the history of work done on some osprey migration tracking. Mark Martell, formerly of TRC and who now works for Audubon Minnesota, put transmitters on birds in the US, and tracked their annual migrations from breeding grounds to wintering grounds in Central and South America.
An interesting bit learned from this project is that East coast birds all
go down the east coast, some fairly far inland, some along the coast proper, to
the tip of Florida, over to Cuba, and then on to Hispaniola (Haiti and the
Dominican Republic). Some winter in the Caribbean, but the majority make the
4-500 mile trip across the Caribbean to Venezuela. From there, they scatter
across much of the South American continent, some going as far as the Pantanal
in Paraguay and Southwestern Brazil. Some truly overachieving birds even make it to
Argentina!
The bird will occasionally adjust the nest material. |
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