What does the evidence say about the historical southern extent of the range of the wolf?
Why do ants do what they do, and what makes them leave? Naturalist Michael Ellis explains.
Do rattlesnakes migrate and hibernate?
What’s the best time and place to see meteor showers from the Bay Area?
A reader wonders how sea palms and other species stay upright while being battered by waves.
A reader wonders which bird travels the farthest each year to arrive in the Bay Area
Recently, Bay Area beachcombers have been spotting dozens of mysterious blue jelly-like creatures littering the beaches. What are they, and why are they here? Bay Nature naturalist Michael Ellis explains.
Q: I collect rainwater to use on my garden and I’ve found Pacific chorus frogs in the black garbage can that collects the rainwater, but I’ve never seen eggs or tadpoles in there. I wonder why not; would they be too small to see? [Marian, San Jose]
Is there a way to tell the difference between male vs female lizards? How do they attract their mates? –Saundra, Concord One way, Saundra, is to wait until spring and watch them mate: The male is on top. But I … Read more
Barnacles are hermaphroditic – they contain both male and female sex organs. You’re thinking, “Well, they always have a date on Saturday night.” No, it’s a really bad idea to self-fertilize: Inbreeding results in little genetic diversity. Worms, slugs, snails – slow-moving animals with low rates of encounter – are all hermaphroditic. And you could not get any slower than an adult barnacle!