10,000 Birds

FEBRUARY 18, 2014

There are two patterns that are fairly extreme that fall into this category: brood parasitism and helper-at-the-nest strategy. In the former, a female lays her fertilized egg in the nest of another species, in the hopes that her offspring will be raised by the unwitting hosts. It turns out that the two strategies may be related.

Breeders 198

Breeders Breeding Science Raised 198

10,000 Birds

APRIL 24, 2012

Within the bird world, so many different strategies and methods of mating and reproduction have evolved, it simply boggles the mind. Male and female Yellow-rumps pair up on their breeding grounds, share duties in raising chicks, then politely part ways when fall migration comes.

Albatross 190

Albatross Lifestyle Birds Raised 190

10,000 Birds

JANUARY 19, 2012

Both Elk and songbirds have the same basic method of inseminating eggs, which is one of the steps in reproduction (but not by any means the first!), Songbirds grow the offspring internally for only a very short while, and then pop out an egg, which is then cared for over a significant period of time until it hatches.

Mammals 163

Mammals Eggs Abandon Abandoning 163

10,000 Birds

MARCH 25, 2020

Her narrator is Gabriel, 23, raised in Northern California by an American father and a Uruguayan mother. And the nandu, a South American rhea, has an intriguing chick-survival strategy: a week before hatching, the male (who does the incubating) pushes one egg out of the nest. What an ugly sentence that is.

Uruguay 153

Uruguay 2001 Bald Eagle Science 153