Reading: Birdfeeder’s negative impact 1. It encourage birds to stay together and transmit diseases. For example, the red eye disease among flinch. 2. Birds are easily be harmed by predators like cats, and they may bump on the windows. 3. It affects their migrating behaviours as they will not move to the warm places if there are enough food, and thus influence their mating productivity. Listening: 1. The natural characteristics of bird make the staying together happen, instead of human's effort. 2. Yes, it is true, but birdfeeder provide nutrients to the birds and they are more healthy and strong, the population is increasing comparing to the little decrease. 3. The signal for their migration is the shortening of sunlight instead of food. They will not stay because of food.
The lecture opposes the view mentioned in the reading with strong supporting evidences presented, aiming to further illustrate that birdfeeder is not as negative as stated in the reading. Firstly, from the perspective of aggregation behaviour, the professor states his doubt, because according to the lecture, although it is true that birds will transmit diseases staying together, however, rather than the effect of bird feeders, it is the nature of birds that bring them together. Therefore, it is not the bird feeder that is to blame. Moreover, judging from the capture by predators, the professor holds a different view, as the lecture further illustrates that birdfeeder provide nutrients to the birds and they are healthier and stronger than before, which leads to the increase in population. And it is a great benefit in contrast to the little decrease. Last but not least, on the point of the migrating behaviour, the professor never fails to express his concern, because birds migrate because of the shortening of sunlight instead of food. They will not stay simply because of the great abundance of food. (181 words)
