Here is a chapter from a book about feminism and evolutionary biology. Many pages are missing but you can get the general picture. Examples from the chapter:
Marzluff and Balda sought an “alpha male” in a flock of pinyon jays. The males rarely fight, so they tempted them with treats and considered instead glances from male birds as dominant displays and birds looking in the air as submissive displays. (This is actually plausible, since apparently the “dominant” males would get to eat the treat after doing this.)
About bird fighting, they wrote, “In late winter and early spring. . . birds become aggressive towards other flock members. Mated females seem especially testy. Their hormones surge as the breeding season approaches giving them the avian equivalent of PMS which we call PBS (pre-breeding syndrome)!”
The obvious alternative explanation is that dominance hierarchies may have been more fierce among females and that they instead should have been looking for an alpha female that determines hierarchies among the men.
That one is a bit old. There’s a 2010 book of theirs on pinyon jays but I couldn’t tell if it kept the same interpretation. So for something from the 90s the author points out that Birkhead’s work on magpies shows a similar gender bias. Female magpies can store sperm for later use, and “cheating” is common. Birkhead focuses almost entirely on males nest-hopping for extra mates, and treats female cheating as a curious anomaly: “Interestingly, some [female] magpies. . . appear to seek extra-male matings.” When you actually examine the data, “some” is not quite as accurate as “most.”
There are other examples in the chapter. Some are better than others.
Like what? Just curious.
Here is a chapter from a book about feminism and evolutionary biology. Many pages are missing but you can get the general picture. Examples from the chapter:
Marzluff and Balda sought an “alpha male” in a flock of pinyon jays. The males rarely fight, so they tempted them with treats and considered instead glances from male birds as dominant displays and birds looking in the air as submissive displays. (This is actually plausible, since apparently the “dominant” males would get to eat the treat after doing this.)
About bird fighting, they wrote, “In late winter and early spring. . . birds become aggressive towards other flock members. Mated females seem especially testy. Their hormones surge as the breeding season approaches giving them the avian equivalent of PMS which we call PBS (pre-breeding syndrome)!”
The obvious alternative explanation is that dominance hierarchies may have been more fierce among females and that they instead should have been looking for an alpha female that determines hierarchies among the men.
That one is a bit old. There’s a 2010 book of theirs on pinyon jays but I couldn’t tell if it kept the same interpretation. So for something from the 90s the author points out that Birkhead’s work on magpies shows a similar gender bias. Female magpies can store sperm for later use, and “cheating” is common. Birkhead focuses almost entirely on males nest-hopping for extra mates, and treats female cheating as a curious anomaly: “Interestingly, some [female] magpies. . . appear to seek extra-male matings.” When you actually examine the data, “some” is not quite as accurate as “most.”
There are other examples in the chapter. Some are better than others.
See this article on Sarah Hrdy.