Animal Reproduction

Several Bird Species Can Store Sperm

May 26, 2021 0
The ability of females in many animal taxa to store sperm is a contributing factor to their level of control over which sperm to select when the time comes to fertilize an egg. A female […]
Animal Parenting

Animal Moms and the Death of Offspring

May 19, 2021 1
For mothers, there is nothing more painful than losing a child. The unfortunate truth in the animal kingdom is that it happens all the time in a variety of circumstances. Causes of Death We call […]
Animal Parenting

Paused Pregnancies In Rodents

May 12, 2021 1
In mammals, embryos can exist in a state of suspended animation. It’s thought that this ability to store fertilized embryos originally evolved to maximize reproductive success. In embryonic diapause, the uterus either sends a signal […]
Animal Reproduction

Female Pygmy Squid Prefer Smaller Males

May 5, 2021 0
Male pygmy squid (Idiosepius paradoxus) attach their spermatophores to the outside of their partner’s body, and multiple males can make such deposits. This leaves females with the choice of which spermatophore to accept, and they […]