• Birds Getting Smaller?

    5 monthes ago - By Ornithology

    There's a thing called Bergmann's Rule. This is an ecogeographical rule that states that within a broadly distributed taxonomic group, populations and species of larger size are found in colder environments, and species of smaller size are found in warmer regions. This only applies to birds and mammals because they produce their own body heat.
    First, think of a cube. A cube that is one unit on a side has a area of 6 square units and a volume of one cubic unit. Increase the side unit to two and the measures are 24 square units surface area and 8 cubic units. Increase the sides to three and...
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