In the author's essay of "Tree swallow nesting boxes in sound view park". http://www.goorulearning.org/gooru/index.g#!/collection/cf2fe192-c646-475d-af75-4ce0a0e9b126/play/534afd56-1233-4823-8563-dddc0e981901
When we consider the issue of swallow birds, some might wonder what's the signification of building nest boxes for swallow birds? The author readdresses the question because she points out the pointers of how is important to provide a home for these birds who come around only in spring.
In this sentence from the article it shows the following
Yesterday, we went to Soundview Park to observe birds, and we saw a lot of robins, phoebes, black sparrows, and tree swallows. We were observing the boxes we made to see if any swallows were inside. At first there wasn't, but for some reason I had a lot of good luck.
Yesterday I saw a blue tree swallow with my own two eyes. I spotted it fighting with a black sparrow that was on top of his house basically telling it to "Get off my house!" Then it went inside of the next box.
Here I am cutting the sides of our nest box for Tree Swallows. Yesterday students from my school and I went to Rocking the Boat again.
It was cool using the binoculars to look at the different types of birds from afar. First we stood in a line and there was a bird in the tree. I think I saw a crow. Then we all went to the park and saw more birds. Every time a student saw a bird he or she would have to describe the beak, color, the wings span, the size of the bird and then something advanced like its habitat or where they live.