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Question

Need help to explain this question on adaptation topic..

is the above question on adaptation for obtaining food and also coping in Land Habitats?

 

thank you! 

Answer

Trying… seems rather long winded though.

(a) Bird W’s eggs had been pushed out of the nest by bird P, in this process, the unhatched eggs either fell to the ground and got broken or did not get the warmth from bird W for incubation. Hence, less eggs of bird W will hatch successfully, resulting in the decrease in number of bird W over time.

[I think “not have a chance to survive” is not specific enough.]

(b) Eggs of bird P hatched earlier and its nestlings of bird P will have food all for themselves (less competition for food) over the next few days before the eggs of bird W hatch. When eggs of bird W hatch, nestlings of bird P are already a few days older will be stronger to compete for the limited food against the newborn nestlings of bird W, therefore a greater chance of survival especially if limited food is available.

(c) Adult bird W (which is feeding both nestlings of birds P and W) will not be able to distinguish an outsider (young bird P) if young bird P remains silent and will continue to feed both nestlings until young bird P is big enough. If in the case where young bird P makes any sound (different from that made by young bird W), adult bird W is likely to chase it out of the nest and not feed it before it is big enough to survive on its own.

[Not sure if teacher can accept “predator” answer since young birds of W in the same nest still make sounds that will attract predator anyway…]

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