Image from the Biodiversity Heritage Library.
Contributed by Museum of Vertebrate Zoology, University of California, Berkeley.
| www.biodiversitylibrary.org
Transcription
July 2
Horse Beach, San Mateo Co. Calif. I pressed the
film.
C.I. gave me about 500 fps from space L.C.
Bunker and I saw one at the same spot June 17, 1973
These are the only times I've seen this species.
The most common diet now seems to be earthworms, not
snails as in older snail-free areas. Some birds eat
earthworms, but also have been observed eating other insects,
including flies and beetles. A few days ago we saw a
bird that was feeding on the ground near our campsite.
We found several small mammals, including voles, mice,
and shrews. One vole had eaten some of the bait we
had left out for them. We also saw a fox eating
some of the bait. The fox seemed to be looking for
something specific, as it kept returning to the same
area where we had placed the bait. It appeared that
the fox was trying to dig up something buried under
the soil. After several attempts, it gave up and left.
We also observed a group of raccoons feeding on
the bait. They seemed to be working together to
remove the bait from its container. The raccoons
were very active and appeared to be enjoying their meal.
We noted that the raccoon population had increased significantly
in recent years, possibly due to the availability of food sources
such as garbage dumps and bird feeders. This increase in
raccoon numbers may have contributed to the decline in
ground squirrel populations observed during our study period.
In conclusion, this field trip provided valuable insights into
the behavior and ecology of various species in California.
It highlighted the importance of understanding local ecosystems
and how they are affected by human activities such as habitat destruction
and pollution. Further research is needed to better understand these dynamics
and develop effective conservation strategies.