Natural History Wanderings

Over the past two years I have developed a special interest in White-throated Sparrows. After years of only seeing them on rare occasions they have become regular winter residents in our yard. What is especially fascinating is they have a unique genetic mutation that impact their mating behavior. There are two subtypes of the bird that are coloured differently, behave differently and mate only with the opposite morph. Read about this unusual pattern in  The sparrow with four sexes : Nature News & Comment