although the rainfall is rather lower right now due to the drought . The soil has plenty of leaves and other decaying matter that enriches it . A large portion of the ecosystem’s primary producers would be the grasses , trees , and bushes that grow nearby the creek . The creek is central to the ecosystem -- a great number of insects and mosses and bacteria live in the creek , which make up a significant percentage of the biomass
in this ecosystem . There are also a large variety of trees that grow in this ecosystem ; there are trees with long , paper like leaves , redwood trees , oak trees , and more broadleaf trees and conifers . During this time of the year , squirrels can be seen gathering acorns and other seeds near clumps of trees .
Week 5 While I was walking back from class today , I happened to notice a bird soaring high above in the sky , and I decided to watch its behavior and decided it was a good opportunity to add to my observations in my journal . I knew that this bird was a hawk of some sort by the way it glided slowly in circles without flapping its wings very much , using the wind and the rising hot air to stay in flight . Its wings were spread out , the ends open like fingers , and its tail open like a fan . While it was pretty far from my vantage point , I was quite sure that the feathers had a spotted , beige-brownish tinge to them , and the tail was more orange-red . It is likely a red-tailed hawk ( Buteo jamaicensis ) , although I am not too sure about it because I didn’t get a close look at it while it was perched . Some other key characteristics of the species are a white underbelly and its call . The hawk glided around for about 4 minutes , before it landed near the top of a
coniferous tree in the distance . I believe this sort of behavior is exhibited by hawks when they are searching for prey on the ground , perhaps squirrels , because there are a lot of those on the campus . At this time of year , this species of hawk may just be scavenging for food . Red-tails consume small game , such as squirrels , rabbits , and rodents . Red-tailed hawks usually construct nests in large trees or on cliffs four to twenty-one meters off the ground , and the nests are made of twigs , and lined with various materials . A couple may defend the same nesting territory for years . Red-tails live in a very large range , being widespread throughout North America , The wide diversity and range of red-tail hawk habitats enable the species to be adaptable and prosperous .
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- Spring '10