| WARMBLOODEDNESS | Impetuosity, a feature of birds and mammals (4-11) |
| VAMPIRE | Bat of Central and South America which feeds on the blood of birds and mammals (7) |
| PLUMAGE | Feature of birds boy attendant spotted round Angus's chimney |
| ECTOTHERMIC | Of all animals other than birds and mammals, having a body temperature regulated by external sources (11) |
| AMNION | Inner of the two membranes enveloping the embryos of reptiles, birds and mammals, enclosed by the chorion (6) |
| AMNIOTE | Team on tour, taking interest in a group of reptiles, birds and mammals (7) |
| RINGS | Hoops, as seen on the tails of many birds and mammals (5) |
| TETRAPOD | Any four-limbed vertebrate animal of the superclass comprising the amphibians, reptiles, birds and mammals (8) |
| PESTS | Used to describe bugs, birds and mammals that eat, infest and debilitate our plants (5) |
| JURASSIC | Period when birds and mammals appeared |
| ECTOTHERM | Cold-blooded animal whose body temperature is maintained by absorbing heat from its environment; i.e. any animal except birds and mammals (9) |
| CRANE | Center of a Venn diagram of "Birds" and "Construction equipment" |
| HASTEMAKESWASTE | Impetuosity adage |
| FLIGHTLESS | Of birds and insects, incapable of taking wing (10) |
| FORAGE | A group of peafowl will ___ on the ground each day for grain, insects, small reptiles and mammals, berries, figs, leaves, seeds, and flower parts |
| COCKSCOMB | Capital feature of bird, one that makes a crow |
| FRINK | Elisabeth, English sculptor and printmaker noted for her depictions of birds and horses (5) |
| CLOACAL | Related to the excretory cavity of birds and reptiles |
| URGES | Subjects of "birds and bees"talks |
| SINGS | Does imitations of birds and rats (5) |
