If copulation was successful during this period, an egg would be fertilized and one or more eggs would be expected.
It is generally believed that a successful copulation takes place 5-10 days before an egg is laid. The history in Decorah for this pair is mid to late February, but has stretched to the first of March.
Generally though, once a pair has succeeded in breeding they are likely to stay together for many years and will defend their territory as a pair.
They may amend or repair an existing nest with branches and vegetation, or build a new nest together as they deepen their commitment to each other.A range of vocalizations, calls and chatter are also an intriguing and interesting component of their paired communication. Bald eagles and most raptors are monogamous, but researchers are finding documented cases of cooperative polyandry and polygyny with trios of adults identified in mating and nesting activities. We hope you enjoy this timely post about all things romantic in the world of bald eagles!For such fierce predators, much of the behavior observed in courtship and pair bonding is remarkably tender and endearing.This artist's impressions show what mating dinosaurs might have looked like, based on the little evidence that does exist (with a bit of artistic license thrown in).
Pentaceratops was a herbivore with five horns on its head and a large bony frill extending backwards from its head.Some people have suggested that female dinosaurs would have struggled to bear the load of males during mating.If males did throw their leg over the female, like elephants and rhinos do today, the load would have been no more than what a female dinosaur lifting one leg up to walk experienced. Her ova are ‘switched on’ by a hormone secreted by her pituitary gland, which is activated by increasing daylight length.They are ‘switched off’ by the hormone prolactin, which is associated with incubation.It may have the longest neck of any dinosaur, reaching up to 12 metres.