Now, there is something you don't see everyday, one bird giving another a free ride. Lets assume the owl is doing this willingly because that little yellow bird needs help. Why don't we see more of this in the world of human beings; or for that matter in the church of Christ?
Paul says...
1 Corinthians, Chapter 12 (World English Bible)
12 For as the body is one, and has many members, and all the members of the body, being many, are one body; so also is Christ. 13 For in one Spirit we were all baptized into one body, whether Jews or Greeks, whether bond or free; and were all given to drink into one Spirit. 14 For the body is not one member, but many. 15 If the foot would say, “Because I’m not the hand, I’m not part of the body,” it is not therefore not part of the body. 16 If the ear would say, “Because I’m not the eye, I’m not part of the body,” it’s not therefore not part of the body. 17 If the whole body were an eye, where would the hearing be? If the whole were hearing, where would the smelling be? 18 But now God has set the members, each one of them, in the body, just as he desired. (emp. added for vs. 18, GDR) 19 If they were all one member, where would the body be? 20 But now they are many members, but one body. 21 The eye can’t tell the hand, “I have no need for you,” or again the head to the feet, “I have no need for you.” 22 No, much rather, those members of the body which seem to be weaker are necessary. 23 Those parts of the body which we think to be less honorable, on those we bestow more abundant honor; and our unpresentable parts have more abundant propriety; 24 whereas our presentable parts have no such need. But God composed the body together, giving more abundant honor to the inferior part, 25 that there should be no division in the body, but that the members should have the same care for one another. 26 When one member suffers, all the members suffer with it. When one member is honored, all the members rejoice with it. (emp. added for vs. 26, GDR)
27 Now you are the body of Christ, and members individually. 28 God has set some in the assembly: first apostles, second prophets, third teachers, then miracle workers, then gifts of healings, helps, governments, and various kinds of languages. 29 Are all apostles? Are all prophets? Are all teachers? Are all miracle workers? 30 Do all have gifts of healings? Do all speak with various languages? Do all interpret? 31 But earnestly desire the best gifts. Moreover, I show a most excellent way to you.(emp. added for vs. 31b, GDR)
God has made us all differently and we should use our talents as we have opportunity. And the answer to the question of "why should we" is found in the passage not listed here- that of the famous "love" chapter that follows this one. One more thing- When we do what we can because we are motivated by love, we just might feel like we are flying.