Adult male cockatiels have bright yellow faces, dark grey bodies and solid grey tail feathers with no barring. Adult female cockatiels have grey faces with traces of pale yellow, dull grey bodies with a brown tint and pa... More »

Male lobsters possess a pair of bony swimmerets close to the body, while females have only feathery swimmerets. The females also have a rectangular sperm receptacle on the underside of the tail, between the second pair o... More »

The difference between male and female seagulls is not very noticeable to the human eye. The only main difference is that male seagulls tend to have brighter plumage than their female counterparts. However, humans are of... More »

Adult male cockatiels are brighter and more vibrant in color, with brilliantly colored heads and defined, contrasting cheek patches. Females are slightly duller, with less defined patches on their cheeks. More »

Adult barred rock roosters crow, have larger wattles, combs, bodies and spurs, have pointed hackle feathers and saddle feathers, and the male comb develops earlier than on females. Hens have a comb that flops to the side... More »

Cockatiels produce a variety of noises including screams, whistles, chatter, hisses and contact calls. The different sounds are ways cockatiels communicate their needs or their reactions to the environment. More »

Canada geese inhabit lakes, ponds and other bodies of water throughout the continental United States and most of Canada. They are 30 to 43 inches long, weigh 6.6 to 19.8 pounds and have a wingspan of about 4 to 5.6 feet.... More » Pets & Animals Birds