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Bat populations increase in coastal San Diego, Floss silk tree blooms

Local riparian woodland begins its seasonal change

The Mexican Free-Tailed Bat prefers roosting in caves but will roost in any building with a dark recess.
The Mexican Free-Tailed Bat prefers roosting in caves but will roost in any building with a dark recess.

Bat populations Increase In Coastal Areas of San Diego County during the fall and winter due to migration. Not only are there bats that are migrating to and through the county coastal areas on north-south migration routes, there are also local migrations, in which bats from inland areas move closer to the coast. You can usually see bats in areas where open water occurs near riparian trees and close to exposed rocky habitat, such as Mission Trails Regional Park near the old Mission dam, or Los Peñasquitos Canyon Preserve near the waterfall. The most common bats in San Diego County include the Mexican free-tailed bat, Yuma myotis, and big brown bat.

A Silk Floss tree flower on a gray October evening in Point Loma.

The Floss Silk Tree, a conspicuous “autumn bloomer” that grows here and there around San Diego, has been showing off its pinkish (or purplish) hibiscus-like flowers for at least a month now. The broad, heavy trunks of this South American import — which are studded with fat, cone-shaped spines — makes it easy to identify.

Hundreds of sycamores can be seen in San Clemente Canyon along Freeway 52.
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Leaves Are Beginning to Turn in coastal San Diego County’s riparian woodland and oak woodland habitats. The summer-green crowns of willows and sycamores are fading from green to yellow and brown. Beneath the oaks, the deciduous poison oak is flushing red. Good locations for autumnal walks this month and next include San Clemente Canyon (Marian Bear) Park adjacent to Freeway 52, Los Peñasquitos Canyon Preserve north of Mira Mesa, and Wilderness Gardens Preserve County Park east of Pala in North County.

The crescent Moon is always low in the sky and around dawn or dusk, never in darkness.


The Moon’s Tilted, Cheshire-cat Smile Returns to the evening sky Thursday evening, October 16. You’ll spot its thin crescent shape low in the southwest about one-half hour after sunset. On succeeding evenings (after nightfall), you can observe the moon’s thickening crescent and its increased prominence in the sky as the week goes by.

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The Mexican Free-Tailed Bat prefers roosting in caves but will roost in any building with a dark recess.
The Mexican Free-Tailed Bat prefers roosting in caves but will roost in any building with a dark recess.

Bat populations Increase In Coastal Areas of San Diego County during the fall and winter due to migration. Not only are there bats that are migrating to and through the county coastal areas on north-south migration routes, there are also local migrations, in which bats from inland areas move closer to the coast. You can usually see bats in areas where open water occurs near riparian trees and close to exposed rocky habitat, such as Mission Trails Regional Park near the old Mission dam, or Los Peñasquitos Canyon Preserve near the waterfall. The most common bats in San Diego County include the Mexican free-tailed bat, Yuma myotis, and big brown bat.

A Silk Floss tree flower on a gray October evening in Point Loma.

The Floss Silk Tree, a conspicuous “autumn bloomer” that grows here and there around San Diego, has been showing off its pinkish (or purplish) hibiscus-like flowers for at least a month now. The broad, heavy trunks of this South American import — which are studded with fat, cone-shaped spines — makes it easy to identify.

Hundreds of sycamores can be seen in San Clemente Canyon along Freeway 52.
Sponsored
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Leaves Are Beginning to Turn in coastal San Diego County’s riparian woodland and oak woodland habitats. The summer-green crowns of willows and sycamores are fading from green to yellow and brown. Beneath the oaks, the deciduous poison oak is flushing red. Good locations for autumnal walks this month and next include San Clemente Canyon (Marian Bear) Park adjacent to Freeway 52, Los Peñasquitos Canyon Preserve north of Mira Mesa, and Wilderness Gardens Preserve County Park east of Pala in North County.

The crescent Moon is always low in the sky and around dawn or dusk, never in darkness.


The Moon’s Tilted, Cheshire-cat Smile Returns to the evening sky Thursday evening, October 16. You’ll spot its thin crescent shape low in the southwest about one-half hour after sunset. On succeeding evenings (after nightfall), you can observe the moon’s thickening crescent and its increased prominence in the sky as the week goes by.

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