Setophaga coronata

We recently saw the return of Yellow-rumped warblers to our yard. They breed in the northern parts of the continent and come south in the non-breeding season.

Males have conspicuous yellow patches on the crown, flank, and rump (the latter giving rise to the nickname “butter butt” among birdwatchers). Their Latin name means “crowned moth-eater”, though they eat plenty of other insect species, as well as spiders.

Happy to see them back!

curious and curiouser

On Sulphur Mountain I saw a curious phenomenon—clusters of baby acorns on one of the coast live oaks. This makes no sense to me, for multiple reasons:

  1. It’s autumn, not spring. The year’s acorn crop is ending, not beginning.
  2. Acorns don’t usually grow in thick clusters like this. They grow singly or in pairs.
  3. There was no evidence of male flowers, whose dried catkins usually linger for quite a while after the female flowers are fertilised.

I know we’ve had a weird weather year, but I only observed this phenomenon in a single tree out of many hundreds I passed. Why would only one tree be affected, if weather was the cause? What’s going on here?

wood rat nest

Our nature journaling trip to Santa Cruz Island was cancelled by the transportation company due to strong winds. Instead, we climbed the Sulphur Mountain Road Trail and journaled frogs, jumping spiders, mutant acorns, wood rat nests, and more. I saw my first northern harrier! What a lovely day with kindred spirits.

Pieris rapae

The cabbage whites (Pieris rapae) are all over my brassicas, of course, but I’m also seeing them in the Park and on ornamentals in the neighbourhood. They seem to especially like purple lantana flowers. Do they also lay their eggs on the plant? Do their larvae eat the leaves, as they do my kale?

On the subject of lantana, it’s highly invasive where I‘m from. It covers an estimated four million hectares in eastern Australia, often to the exclusion of wildlife, people and livestock. So it’s taken me a long while to get used to seeing it as a cultivated garden plant here in Southern California.

Eat up, cabbage whites—lantana not kale!

Sitta carolinensis

White-breasted nuthatches (Sitta carolinensis) eat insects and large, meaty seeds. They get their common name from their habit of jamming nuts and acorns into tree bark, then whacking them with their sharp bill to “hatch” out the seed from the inside. They nest in holes in trees (either created naturally or excavated by woodpeckers) and are most commonly found in deciduous woodland. I was very happy to meet this one today.