Study of birds - ________________________ study of birds’ eggs - ________________
1. Body covering of _________________. Legs covered with ___________. Oil or ___________ gland located at base of tail.
2. Bones are light, porous, & sometimes filled with __________.________________ present – attachment for wings.
3. Forelimbs are ______________.
4. Body supported by ____ hind limbs. Used for __________, __________________, __________________ & _______________________________________.
5. Mouth in the form of a toothless, horny __________. Specialized based on ______________.
6. _____-chambered heart.
7. _____________________ - maintain a constant body temperature.
8. Egg encased in _________ & suited for land. Young birds use ___________________ to peck out of the egg. Singing is used for _______________________________________, _______________________, & _________________.
9. Highly efficient ______________ with air sacs which aid in respiration & buoyancy. _______________ (voice box) is near junction of trachea & bronchi.
10. Semisolid urine - _____________________ released from cloaca.
11. Sexes separate. Testes _____________ with vas deferens opening into the cloaca. Females with left ovary & oviduct. Copulatory organ in ______________________ - others fertilize through the cloaca. _____________ fertilization. __________________ eggs. Incubation _____________. Young active at hatching (______________________) or helpless & naked (__________________).
CLASS: _______________________________
1. Body covered with _______________. Integument with ___________, ____________, & _______________ glands.
2. Young nourished during development in the ________________ of the mother.
3. Young nourished after birth with __________ secreted from the __________________________ of the mother.
4. ______________ breathing throughout life.
5. _____________________ separates the thoracic cavity from the abdomen.
6. _____ - chambered heart. Persistent left aortic arch. Non-nucleated_______________________.
7. Endothermic.
8. _______ cervical vertebrae.
9. ________ pairs of limbs for locomotion in most species.
10. ____________________ used for mental thought, learning, & problem solving. ________________ used for balance
11. Mouth with ____________ on both jaws.
12. ______________ sexes. Reproductive organs of a penis, testes, ovaries, oviduct, & vagina. ______________ fertilization. Eggs develop in a uterus with __________________ attachment (except monotremes) ; fetal membranes __________________________, ______________________, & _____________________.
13. _________________________ appendages. Digits with ______________, ________________, or ____________.
14. Variable dentition – canines, premolars, & molars.