Howler monkeys have to choose

In species with the largest vocal organs, males have the smallest testicles, suggesting an evolutionary trade-off between winning mates and making sperm

Source: Howler monkeys have to choose between big balls and big bawls | New Scientist

Advertisements

Leave a Reply

Please log in using one of these methods to post your comment:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s