There are two types of birds, the one that lives in the same habitat all year around and the ones that migrate seasonally. The common pigeon is one of the famous permanent bird that will not leave their habitat unless their environment drastically lack in food. They complete their life cycle in two places. One to grow their offspring and other to mate. The migratory birds will schedule their reproduction location, non-breeding location, and molting location depending on the time of the year. Most birds will not overlap these times so that they can win the resource competition. If a bird is a migratory one, it has many physiological stress such as weight gain and loss. To travel long distance, it must eat as much as it can to gain twice as much so that they have enough fuel.
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