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When Do the Salmon Run?

When they’re chased!  When not swimming! The Pacific Salmon spawn is highly variable, depending upon individual historic timing for a stream, the species and the geographic location.  Still not much help! In general terms the earliest salmon runs are in the...

Annual Migration

The Annual Movements and Migration of Bald Eagles — a Quick Overview Some researchers don’t consider all bald eagle populations as migratory. Some of the eastern populations, and maybe a few others, basically disperse north after the breeding season,...

Post Fledging Support of Juveniles by Adults

In the wilderness areas in the 1960’s my studies showed that the adults first quit  bringing food to the nest about the 12th week.  After 2-4 days most of the young then fledged — often flying off to land on the beach where the adults could be seen...

Eagle Eggs: when and how they develop

The question has come up from recent observations:  “Does egg laying immediately follow mating?” Simply put — No!  But of course we are dealing with live creatures so variability is expected.   As many people have now observed many of our bald eagles...

Eggs Incubation & Hatching

How Many Eggs do Bald Eagles Lay?   Number of Eggs Laid:    Average 2 per nest. The average for the west coast eagle populations is almost exactly 2 eggs per clutch.  Eagles can lay only one egg but can also lay three eggs and there are some rare records of 4...

To Lay or Not to Lay — is that an Imperative?

What can Stop an Eagle Laying? Interesting question.  The process of laying an egg is not without some considerable preparation on the part of the female.  Probably some months — maybe a few weeks in eagles — the body begins to prepare for the egg.  The...